Discover a new generation of sleep from the Polish manufacturer ONSEN®. Osaka GRID™ is an innovative hybrid mattress for sleeping, designed for people who expect comfort, ergonomic support, a responsive reaction to movement and exceptional breathability throughout the night. Its advanced construction combines high-resilience HR foams of different densities and firmness levels with an elastic ONSEN® GRID™ layer with a square structure, so the mattress adapts to the body without creating the feeling of deep sinking or restricting freedom of movement.

The Osaka GRID™ mattress is a medium-firm hybrid mattress rated at around 7.0/10 on the American firmness scale. In the Polish classification, it corresponds to the H4 mattress category, meaning a medium-firm mattress chosen by people who need a stable sleeping surface without excessive rigidity. In practice, this means:

comfortable body support when sleeping on the side, back and in mixed positions;
spinal stabilization without the feeling of sleeping on a hard board;
easier position changes than on many traditional memory foam mattresses;
more elastic pressure distribution thanks to the ONSEN® GRID™ layer.

This is a significant advantage over many traditional mattresses, which are either too soft and collapsing or too hard and cause point pressure.

The core of the Osaka GRID™ mattress is formed by a hybrid construction of high-resilience HR foams and the ONSEN® GRID™ layer, which work together to provide elasticity, adaptation, stability and intensive ventilation at the same time. The mattress construction was developed to:

support the natural alignment of the spine during sleep;
reduce excessive pressure on the shoulders, hips and lumbar region;
prevent the sinking effect typical of overly soft mattresses;
maintain the responsiveness needed to turn freely in bed;
increase airflow between the body and the mattress surface.

Thanks to this, the Osaka GRID™ hybrid mattress can be a very good choice for people looking for a comfortable mattress for everyday sleep, without compromising between softness, support, durability and breathability.

Osaka GRID™ uses a carefully designed combination of materials that allows you to benefit from high elasticity, point adaptation and stable support without the typical disadvantages of classic memory foam. The mattress uses:

high-resilience HR foams providing dynamic support;
an ONSEN® GRID™ layer with a square structure that supports body adaptation;
an open GRID™ structure improving ventilation and thermal comfort;
a layer system reducing the feeling of suction and overheating;
a construction that helps the mattress return to its original shape.

As a result, Osaka GRID™ is a sleeping mattress that combines comfort, elasticity, stability and modern ventilation technology. It does not force one sleeping position, but supports the body when you naturally change your position during the night.

A very important element of the Osaka GRID™ construction is the ONSEN® GRID™ layer. It is an advanced, elastic grid with square geometry that works under body pressure, supporting surface adaptation, stability and intensive airflow. In practice, this means:

more responsive and point-specific adaptation to the body shape;
better air circulation at the mattress surface;
more efficient removal of excess heat and moisture;
greater thermal comfort throughout the night;
a feeling of lightness and freshness during sleep.

That is why Osaka GRID™ works well as a breathable mattress, a premium hybrid mattress and a mattress for people who expect modern ergonomics, high breathability and comfort without the sinking effect.

The Osaka GRID™ mattress is a modern premium hybrid mattress that uses:

the dynamic responsiveness of high-resilience HR foams;
an elastic ONSEN® GRID™ layer supporting body adaptation;
a multi-layer construction supporting sleep ergonomics;
an open structure improving thermal comfort;
a ventilation system supporting a fresh and hygienic sleep environment.

As a result, Osaka GRID™ is a combination of comfort, breathability, stable support and modern GRID™ technology that is difficult to achieve in randomly selected foam or spring mattresses.

The Osaka GRID™ hybrid mattress is made in Poland, where it is created based on:

evidence-based design, meaning design based on data;
design thinking methodology;
the jobs to be done approach, focused on real user needs;
quality control at every stage of production.

Every element of the Osaka GRID™ mattress has been designed to support body regeneration, improve sleep comfort and ensure long-lasting everyday use.

By choosing our Osaka GRID™ hybrid mattress, you invest in:

ergonomic spinal support;
comfortable sleep without the sinking effect;
very good mattress ventilation;
modern ONSEN® GRID™ technology;
durability and the quality of Polish production;
a reasonable price without intermediary margins.

Choose the Osaka GRID™ hybrid mattress from ONSEN®, which combines modern sleep technology, comfort, breathability and stable support from the very first night.

Mattresses from the Polish brand ONSEN® are offered exclusively through direct sales. You will not find our products at any intermediaries. Choose the original ONSEN® sleeping mattress to enjoy healthy, comfortable and consciously designed sleep.

Dimensions of the mattress

ONSEN® manufactures the Osaka GRID™ hybrid mattress in selected standard sizes, adapted to the most commonly chosen single, double and family beds.

The length of the Osaka GRID™ mattress is 200 centimetres.

The width of the Osaka GRID™ mattress is 90, 140, 160 or 180 centimetres, depending on the selected variant.

The height of the Osaka GRID™ mattress is 21 centimetres.

The standard sizes of the Osaka GRID™ hybrid mattress are:

90x200 centimetre mattress;
140x200 centimetre mattress;
160x200 centimetre mattress;
180x200 centimetre mattress.

Due to the use of high-density high-resilience foams and an additional ONSEN® GRID™ layer, the Osaka GRID™ hybrid mattress is a massive and stable product. Its weight is several dozen kilograms, depending on the selected size. The higher weight is a natural consequence of its solid hybrid construction, which contributes to stability, durability, responsiveness and comfort of use.

The specific nature of the production process and the properties of the foams used may cause slight differences in the actual dimensions or weight of individual units. Such technological deviations do not affect the quality, functionality or comfort of use of the Osaka GRID™ mattress.

Made-to-measure mattress

The Osaka GRID™ hybrid mattress is offered only in the available standard sizes. In this product version, we do not make custom mattresses, meaning mattresses in non-standard sizes prepared according to individual dimensions provided by the customer.

This decision results from the advanced construction of the Osaka GRID™ mattress. The ONSEN® GRID™ layer and the precisely matched layer system used in it require production in specific formats in order to maintain the proper ergonomics, stability, ventilation and durability of the entire mattress.

If you need a custom-size mattress, meaning a mattress in a non-standard size, choose the Osaka Air foam mattress. This is the only ONSEN® mattress model that we make to measure according to the customer's individual specification.

Mattress layers

The entire core of the Osaka GRID™ hybrid mattress is made of an advanced combination of the elastic ONSEN® GRID™ layer and fully safe high-resilience HR foams with an open-cell structure. It is their carefully designed arrangement that provides responsiveness, stable support, body adaptation, freedom of movement and intensive mattress ventilation.

The construction of the Osaka GRID™ mattress has been designed so that the GRID™ layer works close to the body, while the subsequent HR foam layers stabilize the body shape and support the proper alignment of the spine during sleep.

ONSEN® GRID™ with HR35120 casing - the upper layer of the mattress with an elastic GRID™ structure with square geometry, enclosed on the sides with high-resilience HR35120 foam with a density of approximately 35 kg/m³, firmness of approximately 120 N according to the ILD method and approximately 2.4 kPa according to the CLD method. It is responsible for a responsive and dynamic reaction to body pressure, surface adaptation, pressure reduction and very good air circulation without the sinking effect.
HR35120 - high-resilience HR foam with a density of approximately 35 kg/m³, firmness of approximately 120 N according to the ILD method and approximately 2.4 kPa according to the CLD method. It stabilizes the body, supports proper spinal alignment and acts as a responsive transition layer beneath the GRID™ technology.
HR35150 - high-resilience HR foam with a density of approximately 35 kg/m³ and increased firmness of approximately 150 N according to the ILD method. It serves as the middle stabilizing layer, strengthens body support and limits excessive mattress deflection in areas of higher pressure.
HR50160 - high-resilience Richlux® High Resilience HR50038 foam with a density of approximately 50 kg/m³, firmness of approximately 160 N according to the ILD method and approximately 3.8 kPa according to the CLD method. It forms the stable load-bearing layer of the mattress, increasing its durability, resistance to deformation and quality of support.

The most important element of the Osaka GRID™ construction is the upper ONSEN® GRID™ layer, made using modern and unique technology. Its square spatial structure supports airflow at the mattress surface, while helping to remove excess heat and moisture and increasing thermal comfort during sleep.

The GRID™ layer works together with high-resilience HR foams, which ensure the stability, responsiveness and durability of the entire core. As a result, the Osaka GRID™ hybrid mattress combines the feeling of modern, elastic comfort with reliable body support, without the sinking effect typical of overly soft mattresses.

This carefully designed sleeping mattress construction supports proper air circulation, reduces body overheating and helps maintain a hygienic sleep environment. This is especially important for people looking for a breathable mattress, a premium hybrid mattress and a comfortable mattress for everyday regeneration.

Bed slats for the mattress

Unlike many manufacturers, the Polish brand ONSEN® does not impose one specific type of slatted base or a particular bed model. The Osaka GRID™ mattress was designed to work well with different kinds of support. What matters most, however, is that the mattress base is stable, sufficiently dense and matched to the mattress size.

A well-chosen base affects not only sleep comfort, but also mattress durability, proper body support and air circulation. A structure that is too weak, slats that are too thin, or gaps that are too wide can cause the mattress to sag, reduce ergonomics and accelerate wear of the core. This applies to any mattress, regardless of its type, price or manufacturer.

Osaka GRID™ can be used on a rigid slatted base, a flexible slatted base, a continental (boxspring) bed, or a stable pallet construction, provided the surface offers adequate support and does not allow excessive bending.

For the mattress to perform properly, the proportions of slats and the gaps between them are key:

with wide slats (5-7 cm), at least 17-18 slats are recommended and the gaps should not exceed 4 cm;
with narrow slats (3-4 cm), at least 19-20 slats are recommended and the gaps should not exceed 3 cm;
very narrow, thin or widely spaced slats, typical of low-quality bases, are not recommended;
the mattress should extend at least 10 cm above the bed frame to keep the bed comfortable and safe to use.

If you use a bed with two separate electric adjustable bases, the best solution is to choose two separate mattresses. One large mattress placed on two independently operating electric bases may bend unevenly, which reduces comfort and can negatively affect durability.

A rigid base provides stable support and good ventilation, as long as it is made from sufficiently strong slats arranged with the correct spacing. This is a good choice for people who prefer a more stable feel while sleeping.

A flexible slatted base can add a bit more bounce and dynamism. For some users, including seniors, this may make it easier to change position and get out of bed, especially when the bed frame is at the right height.

A continental (boxspring) bed usually offers high stability and firm support. It is worth paying attention to ventilation, however, as some boxspring designs can restrict airflow under the mattress.

Pallets as a mattress base can provide stable, firm support, but they should be smooth, clean, dry and arranged so they do not damage the cover or the mattress core. They are not the best option for people with limited mobility, because they typically sit low to the floor.

Thanks to its multi-layer construction, responsiveness and ventilation system, the Osaka GRID™ hybrid mattress performs well on many types of support. The condition is a stable, even and breathable base that helps maintain sleep comfort, ergonomic spinal support and long-term durability for years to come.

Mattress delivery and returns

ONSEN® provides free delivery within Poland for all orders placed in our online store. We also offer good-value international shipping to countries in the European Union, the European Economic Area, and other selected destinations.

We ship most orders quickly, usually within 48 hours of purchase. This means you can receive your Osaka Air mattress, an orthopedic pillow, or another ONSEN® product promptly and start testing sleep comfort in your own home.

For most of our products, we offer the option of a 100-day return period from the day you receive your parcel. During this time, you can use the mattress, sleeping pillow, or any other product as normal, checking it in conditions that truly matter - in your own bedroom, during everyday sleep and recovery.

This matters because choosing a sleep mattress or an orthopedic pillow should not be based on just a few minutes of testing in a store. ONSEN® lets you try the product calmly - without rush and without sales pressure.

Warranty for the mattress

ONSEN® provides up to a 15-year warranty on its products! The warranty periods are:

15 years for the Osaka Air mattress core;
2 years for the Osaka GRID™ mattress core;
10 years for the cores of the Asana, Enso, and Hiro orthopedic pillows;
2 years for the cores of the Asana GRID™, Enso GRID™, and Hiro GRID™ orthopedic pillows;
2 years for classic pillow filling;
2 years for mattress covers;
2 years for pillowcases;
2 years for bedding;
2 years for fitted sheets;
2 years for mattress protectors;
2 years for furniture;
2 years for the remaining assortment.

Up to 100 days for returns

Guided by our commitment to customer satisfaction and an ethical approach to business, ONSEN® offers the option to return your order within 100 days of delivery. There are no additional fees for the testing period, so upon receiving the return, we refund the full amount without any deductions. This special offer applies to all our mattresses, orthopedic pillows, and ergonomic furniture. For other products, the standard statutory 14-day return policy applies.

You will experience the true performance of a mattress after at least 30 nights of use in natural conditions. We recommend not returning the product earlier than 50 nights after delivery, allowing you to properly evaluate the mattress's features.

As a responsible manufacturer confident in the high quality of our products, ONSEN® enables genuine and unrestricted product testing in the comfort of your own bedroom. This allows for a full assessment of their functionality and represents an innovative solution that likely no other Polish mattress manufacturer currently offers. This also sets us apart from brick-and-mortar stores, which typically do not offer any return options at all.

Learn more

We also encourage you to explore our articles full of expert knowledge on the best blog about sleep and health, as well as the extensively developed Healthy Sleep Encyclopedia, created by the ONSEN® team of specialists. For those who care about spinal health, we recommend the spine exercise set, prepared by a physiotherapist.

Instructions for use

The product presented here is intended for use by non-professional users (laypersons) in accordance with the instructions for use. The foam mattress, orthopedic pillows, and other products we offer have no contraindications for use. Their usage does not require training. If symptoms worsen, contact a doctor immediately.

You can find user manuals and declarations of conformity at: https://onsen.eu/dokumenty

EUDAMED Data

Basic UDI-DI:
90x200: 5907497231OG90SAA
140x200: 5907497231OG140SA4
160x200: 5907497231OG160SAE
180x200: 5907497231OG180SAQ

UDI-DI:
90x200: 59074972312290
140x200: 59074972313976
160x200: 59074972314034
180x200: 59074972314102

Catalogue number (EAN):
90x200: 5907497231229
140x200: 5907497231397
160x200: 5907497231403
180x200: 5907497231410

Trade names:
PL: Ortopedyczny materac hybrydowy Osaka Grid
EN: Orthopedic hybrid mattress Osaka Grid
DE: Orthopädische Hybridmatratze Osaka Grid

EUDAMED

Other products you may like:

Orthopedic pillow

Asana GRID™

Standard

161,67 €

Bed sheet

Skin+

160x200

173,57 €

Mattress protector

Mizu

160x200

172,86 €

Who is the Osaka Air foam mattress for?

The Osaka Air foam mattress is a universal sleeping mattress for anyone looking for stable, flexible, and comfortable body support. It has been designed to work well for users with various needs, including different sleeping positions and expectations from a mattress.

The Osaka Air mattress is an original project of the Polish company ONSEN®, created from scratch by our team as a unique response to the real needs of users. It is not a copy of a ready-made solution or a standard mattress from a component catalog, but an exceptional construction combining four carefully designed foam layers, the Aero 3D ventilation system, and ergonomics designed for comfortable sleep. As a result, the Osaka Air stands out on the market, offering a solution you will not find from other manufacturers.

Created by ONSEN®, the Osaka Air foam mattress is an innovative and functional mattress designed to provide high sleep comfort over many years of use. Its medium firmness, rated at approximately 6.5/10 on the American firmness scale, makes it a true H3 mattress according to Polish tables. This makes the Osaka Air mattress a great choice for people who need stable yet flexible support.

Our innovative Osaka Air mattress is built with four layers of high-quality foams responsible for durability, resilience, and comfort. The thermoelastic foam (memory foam) used in the second layer supports body contouring and the reduction of pressure points. However, because a layer of highly elastic HR foam is placed above it, it does not cause a sinking effect or overheating, nor does it create difficulties in changing positions. The carefully thought-out construction of the Osaka Air mattress allows for comfortable adaptation to the body and excellent pressure relief during sleep.

What also distinguishes the Osaka Air foam mattress is the Aero 3D mesh, which, together with a modern cover, creates a system for wicking away moisture and excess heat. Thanks to this, the mattress supports proper air circulation throughout the night, reducing overheating and improving sleep hygiene. The unique design of the Osaka Air mattress ensures optimal spinal support, helping to maintain a healthy posture during sleep while simultaneously allowing for free movement and repositioning.

This mattress is:

for side, back, and stomach sleepers,
for people who frequently change positions during sleep,
for people looking for a universal H3 mattress,
for couples with different needs and preferences,
for people who want stable support without the "hard board" effect,
for people who dislike sinking into classic memory foam.

Choose the Osaka Air mattress if you:

want a mattress perfect for one person, a couple, or more people,
are looking for a medium-firm mattress with a firmness rating of about 6.5/10,
need stable spinal support,
value flexibility and unrestricted position changes,
want to reduce pressure points on your shoulders, hips, and back,
tend to overheat on traditional foam mattresses,
are looking for a durable mattress manufactured in Poland.

The design process of the Osaka Air mattress was based on the design thinking method and the jobs-to-be-done approach, meaning the analysis of real user needs. The production of Osaka Air mattresses takes place in Poland and is subject to strict quality control, allowing us to maintain a high standard of craftsmanship, production repeatability, and the durability of every unit.

Osaka Air or Osaka GRID™?

CHOOSE MATTRESS TYPE

Which ONSEN® OSAKA mattress should you choose?

Compare the ONSEN® Osaka Air and ONSEN® Osaka GRID™ mattresses
	OSAKA AIR ONSEN® foam mattress	OSAKA GRID™ ONSEN® GRID™ technology
intended use	universal foam mattress for everyday sleep for one person or a couple, featuring an innovative layered construction	a more advanced mattress with an additional ONSEN® GRID™ layer for those expecting even higher comfort
technology	four layers of high-quality foams, including highly elastic HR foams and properly positioned thermoelastic (memory) foam	mattress construction enriched with an additional layer of elastic ONSEN® GRID™ polymer in a grid layout
comfort	stable, resilient, and predictable support with body contouring, without the effect of sinking into the mattress	more adaptive surface feel with more pronounced pressure relief and a sense of softness
spinal support	ergonomic body support that helps maintain the natural alignment of the spine during sleep	ergonomic support known from the Osaka Air, complemented by a more pinpoint surface adaptation to body pressure
pressure relief	very good - thanks to the layered construction and thermoelastic foam placed beneath the HR foam layer	increased - thanks to the action of the elastic GRID™ layer, which precisely reacts to the pressure on shoulders, hips, and back
ventilation	high - thanks to open-cell foams, ventilation channels, Aero 3D mesh, and a modern cover	even higher - thanks to the open structure of the ONSEN® GRID™, which supports airflow at the mattress surface
thermoregulation	reduces overheating compared to many classic foam and memory foam mattresses	more effectively supports heat and moisture dissipation thanks to the additional spatial GRID™ layer
elasticity	high resilience, quick response to movement, and easy position changes during sleep	high resilience complemented by greater surface elasticity of the polymer layer
sleeping experience	stable, comfortable, and resilient support, without the sinking effect typical of many memory foams	soft initial feel, greater adaptation to the body, and the effect of modern, luxurious comfort
for whom	for people looking for a universal, durable, and breathable H3 foam mattress	for people who want everything the Osaka Air mattress offers but expect even greater comfort, ventilation, and pressure adaptation

Choose your ONSEN® OSAKA mattress

Go directly to the corresponding ONSEN® mattress model to choose the version best suited to your needs.

Osaka Air Osaka GRID™

The table compares the Osaka Air foam mattress and the Osaka GRID™ mattress in terms of intended use, technology, comfort, spinal support, pressure relief, ventilation, thermoregulation, elasticity, and sleeping experience.

Match the mattress size ONSEN®

CHOOSE MATTRESS SIZE

Which ONSEN® Osaka mattress size should you choose?

Compare the sizes of Osaka Air and Osaka GRID™ mattresses
size	for whom?	OSAKA AIR PREMIUM	OSAKA AIR CURE™	OSAKA GRID™ GRID™
80x200 mattress	for one person, for a narrow bed, teenager's room, small bedroom, or guest room	select	select	not available
90x200 mattress	the most universal single size, good for an adult, teenager, and solo sleeper	select	select	select
100x200 mattress	for one person who wants more space than on a classic 90x200 mattress	select	select	not available
120x200 mattress	comfortable single size or a very compact mattress for two people sleeping close together	select	select	not available
140x200 mattress	for a couple in a small bedroom or for one person who wants a lot of freedom during sleep	select	select	select
160x200 mattress	the most frequently chosen size for a couple, a good compromise between comfort and space in the bedroom	select	select	select
180x200 mattress	comfortable size for a couple, especially when one or both people frequently change positions during sleep	select	select	select
200x200 mattress	the largest standard size for a couple, family, large bedroom, and people expecting maximum space	select	select	not available

How to choose a mattress size?

For one person, an 80x200, 90x200, or 100x200 mattress is most often chosen. For a couple, 160x200 is usually the safest choice, while 180x200 and 200x200 sizes provide greater comfort. If the bedroom is small, 140x200 can be a good compromise. If you sleep restlessly, change positions frequently, or share the bed with a child or a pet, choose the largest possible size.

Custom-size Osaka Air mattress

If you need a non-standard size, ONSEN® can make a custom-size Osaka Air mattress to order. This applies exclusively to the Osaka Air model. The Osaka GRID™ mattress is available only in selected standard sizes and is not made to measure.

Custom-size Osaka Air mattresses are priced according to the nearest larger standard size. The length of a custom mattress can range from 180 cm to 220 cm. To order a custom mattress, add the nearest larger Osaka Air size to your cart and enter the expected dimensions in the order comments.

Custom-made mattresses are not subject to promotions or the return policy provided for standard products.

The table helps you choose the size of the Osaka Air or Osaka GRID™ mattress. It compares sizes 80x200, 90x200, 100x200, 120x200, 140x200, 160x200, 180x200, and 200x200 and indicates for whom a given mattress size will be best. It also informs that custom-size mattresses are available exclusively for the Osaka Air model, and the Osaka GRID™ is not made to individual order.

Why choose the Osaka Air foam mattress?

The Osaka Air is a foam mattress for sleeping that combines stable spinal support, high elasticity, effective ventilation, and the comfort of daily regeneration. It was designed as a universal H3 medium-firm mattress, suitable for side, back, and stomach sleepers, as well as those who frequently change positions at night. It is a practical choice if you value ergonomics, durability, breathability, and comfort without the trapping effect typical of many classic memory foam mattresses.

Key benefits of the Osaka Air foam mattress

Ergonomic spinal support - the multi-layer construction helps maintain the natural alignment of the body during sleep.
Universal firmness - a medium firmness of about 6.5/10 provides stable yet flexible support.
Four layers of high-quality foams - highly elastic HR foams and a properly positioned thermoelastic (memory) foam support comfort and durability.
No trapping effect - the Osaka Air mattress adapts to the body but facilitates easy position changes.
Better ventilation - ventilation channels, Aero 3D mesh, and a breathable cover support air circulation within the mattress.
Polish ONSEN® production - the mattress is manufactured in Poland and is an original design by the ONSEN® brand.

What does the Osaka Air mattress offer in practice?

Ergonomic body support: Osaka Air acts as a modern mattress for the spine because it supports the natural alignment of the body during sleep. Its design helps reduce excessive sinking of the hips, shoulders, and lumbar region, which is crucial for back comfort and the quality of regeneration.
Comfort without the sinking effect: The use of thermoelastic foam in the second layer allows for body contouring and the reduction of pressure points. At the same time, the top layer of highly elastic HR foam minimizes the trapping effect, meaning the mattress does not restrict movement and allows for easy position changes during sleep.
Universal H3 firmness: The Osaka Air mattress has a medium firmness rated at approximately 6.5/10 on the American firmness scale. Assuming the H3 designation refers to a medium-firm mattress, Osaka Air is a true H3 mattress. However, it is worth noting that the H1-H4 scale is not standardized in Poland, which means an H3 mattress from one manufacturer can differ significantly from an H3 mattress from another brand. At ONSEN®, we consistently advocate for the creation of national standards for mattress firmness ratings, so customers can compare products fairly and clearly.
More airflow during sleep: The ventilation system, based on foam channels, Aero 3D mesh, and three-dimensional pores in the cover, supports the dissipation of excess heat and moisture. Because of this, the Osaka Air foam mattress reduces overheating and helps maintain a fresh, hygienic sleep environment.
Durability for years: The four layers of high-quality foams have been selected to ensure resilience, stability, and resistance to deformation. Osaka Air is a mattress built for daily use over many years, not a random product from a catalog of ready-made solutions.
Original ONSEN® design: The Osaka Air mattress was designed from scratch by ONSEN® using design thinking and the jobs-to-be-done approach. It is a unique construction created in response to the real needs of users: comfort, support, breathability, durability, and freedom of movement during sleep.

A perfectly breathable mattress This section presents the Osaka Air foam mattress as a breathable sleeping mattress with a ventilation system, Aero 3D mesh, and a design that reduces overheating during sleep.

Introduction to the feature: the breathable Osaka Air foam mattress

The Osaka Air foam mattress stands out with its original layered construction, which supports maximum air circulation throughout the night. As a result, it reduces body overheating, helps wick away moisture, and improves sleep comfort without feeling stuffy.

Expand

How does the Osaka Air ensure breathability and thermal comfort? This section describes how the Osaka Air foam mattress reduces overheating, supports moisture wicking, and ensures air circulation thanks to HR30100 foam, V50075 foam, ventilation channels, Aero 3D mesh, and a breathable cover.

Consumer research and everyday user experiences show that one of the most common sleep problems is body overheating and excessive night sweats. This is particularly important because thermal comfort affects not only coziness but also the quality of regeneration.

This problem often affects thermoelastic mattresses, also known as memory foam mattresses. Their top layer of memory foam can excessively trap heat, especially when it is located directly beneath the user's body.

One of the biggest drawbacks of a classic memory foam mattress is the heat reflection effect. It occurs when the foam absorbs body heat and then radiates it back toward the sleeper, increasing the perceived temperature during sleep.

Moreover, many memory foam mattresses fail to provide adequate air circulation. This is due to the low dynamics of the material and the restricted airflow caused by temperature, pressure, and the foam contouring closely to the silhouette.

The Osaka Air foam mattress was designed to effectively reduce the problem of nighttime overheating. Its well-thought-out construction, developed through a design thinking process and the jobs-to-be-done approach, responds to the real need for a fresh, breathable, and comfortable sleep.

The first layer of the Osaka Air mattress consists of a 3-centimeter highly elastic HR30100 foam. Its open-cell structure supports free airflow, while the appropriate density and firmness provide stable body support without the sinking effect.

It is the second layer that consists of a 4-centimeter thermoelastic V50075 foam. Because it is not placed directly next to the body, it can contour to the silhouette and reduce pressure points without causing the trapping effect or excessive heating typical of many memory mattresses.

The use of V50075 thermoelastic foam in the second layer combines adaptive comfort with greater freedom of movement. Unlike classic thermoelastic mattresses, the Osaka Air does not restrict position changes but rather supports natural body alignment and comfortable sleep throughout the night.

An additional advantage of the Osaka Air mattress is its advanced ventilation system. It consists of transverse ventilation channels, a modern Aero 3D mesh made of thousands of microfilaments, and a thoughtfully designed cover that promotes airflow.

A crucial role is also played by the mattress cover, which works together with the ventilation channels and the Aero 3D mesh. As a result, excess heat and moisture can be dissipated outward more effectively, keeping the sleep surface fresher and more pleasant.

Thanks to these solutions, the Osaka Air foam mattress effectively supports the dissipation of excess heat and moisture, ensuring extremely high breathability all night long. This is why the Osaka Air is the go-to choice for those looking for a modern bedroom mattress that combines ergonomics, ventilation, and the comfort of daily regeneration.

100-day mattress return policy This section presents the 100-day return policy for the Osaka Air mattress and explains why testing a mattress at home is more reliable than a quick test in a physical store.

Introduction to the feature: 100-day return policy for the Osaka Air mattress

At ONSEN®, we give you the option to return the Osaka Air mattress for up to 100 days from delivery. You can sleep on the mattress normally, test it in your own bedroom, and make your decision without pressure. In the event of a return, you will receive a full refund with no fees charged for testing.

Expand

Why is it best to test the Osaka Air mattress at home? This section describes the rules for the at-home sleep trial of the Osaka Air mattress, the 100-day return policy, the limitations of in-store mattress testing, and the benefits of ONSEN's direct-to-consumer model.

We know that testing a mattress in a store is unreliable, which is why we give you time to calmly evaluate it at home. A mattress is a crucial product for your health, regeneration, and sleep quality, and its comfort can only be reliably assessed during normal use, under everyday resting conditions.

Lying down on a mattress for a few minutes in a physical showroom does not show how your body will react after a full night's sleep. It is difficult to assess mattress comfort while fully dressed, fully conscious, in an artificial environment, and under the observation of salespeople and other customers.

That is exactly why ONSEN® allows you to test the Osaka Air mattress in your own bedroom. That is where you truly sleep, change positions, rest, wake up in the morning, and can honestly verify whether the mattress provides the right support, coziness, and thermal comfort.

A reliable assessment of mattress comfort requires many nights, as your body needs time to adjust to the new support. That is why you shouldn't make a decision after a few-minute test or even after just one night. A mattress should be evaluated over time, considering we spend about 1/3 of our lives sleeping.

Buying a mattress is an important decision, which is why you can test the Osaka Air mattress at home without rushing and without pressure from a salesperson. We give you up to 100 days so that your decision to keep the product is conscious, calm, and based on your real sleep experience.

Sleep on the mattress, rest, read books, work on your laptop, let your children use the bed, and let your pets lounge next to you. Use the mattress exactly as you intend to use it for the years to come. Only then will you know if the Osaka Air is the right choice for you.

ONSEN® exposes the unfair practices used by many mattress sellers who suggest that a few minutes in a store is enough to make an informed choice. In our opinion, a true mattress test takes place at home, night after night, in natural sleep conditions.

This is why we offer mattresses online in a direct-to-consumer sales model, avoiding high middleman margins. Physical sales take place exclusively in our company showroom at the ONSEN® headquarters. This model allows us to maintain a fair price, offer direct contact with the manufacturer, and provide the genuine opportunity to test the mattress in your own bedroom.

A mattress for the whole family This section presents the Osaka Air foam mattress as a universal family mattress, suitable for various sleep positions, different body types, and users with diverse needs.

Introduction to the feature: Osaka Air mattress for the whole family

The Osaka Air foam mattress is a universal mattress for the whole family, regardless of your preferred sleep position. Thanks to its high elasticity, it does not hinder changing positions at night, ensuring freedom of movement, stable support, and comfort for users of various body types.

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Why is the Osaka Air suitable for various users? This expanded section describes why the Osaka Air foam mattress is a good choice for families, couples, and people of various body types. It explains the importance of the first HR30100 layer, the second V50075 layer, freedom to change positions, stable support, motion isolation, and comfort without the sinking effect.

Using highly elastic HR30100 foam in the first layer of the Osaka Air mattress, and placing the thermoelastic V50075 foam in the second layer, allows for complete freedom when changing sleep positions. This is crucial for children, adults, seniors, and couples who have different needs and resting styles.

Many users of thermoelastic mattresses complain about a sinking or trapping effect, which makes turning and changing positions difficult. This results from the properties of memory foam, which softens under the influence of temperature and body pressure, and then returns to its original shape much more slowly.

Although this effect is initially perceived as a pleasant hug, in practice it can limit sleep comfort. A body surrounded by sunken memory foam has less freedom of movement, and restricted air circulation can lead to overheating and more frequent awakenings.

Placing thermoelastic foam directly in the top layer of a mattress can be particularly problematic for older adults, people with limited mobility, and users who frequently change positions. Sinking too deeply can make getting up, turning over, and maintaining stable body alignment difficult.

Moving the V50075 thermoelastic foam to the second layer helped to mitigate these problems. The Osaka Air mattress retains the benefits of contouring foams but simultaneously provides a more dynamic sleep surface, without the feeling of being trapped in the mattress.

As a result, the Osaka Air works perfectly as a mattress for couples, a family mattress, and an everyday sleeping mattress. It supports the comfort of side, back, and stomach sleepers, as well as those who change positions multiple times during the night.

The innovative layered construction of the Osaka Air mattress ensures high dynamics, stable support, and excellent motion isolation. This means that the movement of one person is less felt by the other, increasing the sleep comfort of a partner, child, or another household member sleeping nearby.

The Osaka Air is also an intimacy-friendly mattress, as its resilience, stability, and quick response to movement ensure that it does not restrict natural activity in bed. It is a functional choice for those who want one mattress for sleep, rest, regeneration, and everyday family life.

Ideal spinal support This section presents the Osaka Air foam mattress as a mattress providing ergonomic spinal support, physiological body alignment, and pressure point reduction during sleep.

Introduction to the feature: ideal spinal support by the Osaka Air mattress

Each layer of the Osaka Air foam mattress has been designed with a specific function in mind, in line with the jobs to be done approach. Their precise combination supports comfortable sleep, proper spinal alignment, and stable body support in various sleep positions.

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How does the Osaka Air support the spine during sleep? This expanded section describes how the Osaka Air foam mattress supports the spine, hips, shoulders, and limbs thanks to four foam layers, appropriate firmness, density, resilience, and the combination of HR and V foams.

In the unapologetically perfect Osaka Air mattress, we applied the jobs to be done methodology because the most important thing is not the mattress as an object, but the task it is supposed to perform for the user. It is meant to support sleep, regeneration, comfort, and proper spinal support every single night.

We do not buy a mattress just to have one, but to sleep better, regenerate more easily, and wake up without unnecessary tension. A good sleeping mattress should support the body, minimize negative sensations, and help maintain a comfortable position throughout the night.

Thanks to a well-chosen, functional mattress, sleep comfort and the quality of everyday rest improve. Body alignment during sleep is of key importance because the spine, hips, shoulders, and limbs should be supported in a stable, but not overly rigid manner.

The layers of the Osaka Air foam mattress have been designed to work together and provide ergonomic support. The carefully selected firmness, density, and resilience of the foams help distribute body weight evenly and reduce points of excessive pressure.

In practice, this means that the body does not randomly sink deep into the mattress, but receives stable support exactly where it is needed. Thanks to this, the spine can remain in a more physiological alignment, regardless of whether you sleep on your side, back, stomach, or change positions frequently.

The unique construction of the Osaka Air foam mattress combines the advantages of highly elastic HR foams and properly placed thermoelastic V foam. This combination allows for body contouring, pressure reduction, and stability, without the deep sinking effect typical of many memory foam mattresses.

This is exactly why the Osaka Air is a good choice for people looking for a mattress for spinal support, an H3 medium-firm mattress, and a foam mattress that provides comfort without compromising between softness and stable support. Its task is to support the body, not to force a single, artificial sleep position.

The unapologetically perfect Osaka Air mattress possesses the key features of an ideal mattress: ergonomic support, elasticity, breathability, stability, durability, and the freedom to change positions. It is also an orthopedic mattress, registered in EUDAMED as a Class I medical device.

A full 15-year mattress warranty This section presents the warranty for the Osaka Air foam mattress, including a 15-year warranty on the mattress core and a 2-year warranty on the mattress cover.

Introduction to the feature: 15-year warranty on the Osaka Air mattress

ONSEN® offers a full 15-year warranty on the Osaka Air foam mattress core and a 2-year warranty on its cover. Clear and transparent warranty terms demonstrate that the Osaka Air is a durable mattress designed for many years of everyday use.

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What does the ONSEN® warranty cover? This section details the ONSEN warranty periods, including a 15-year warranty on the Osaka Air mattress core, a 2-year warranty on the cover, mattress durability, foam quality, and the importance of hygienic mattress replacement after many years of use.

ONSEN®'s mission is to offer products of the highest quality that retain their properties and serve you for many years. That is why we design mattresses, pillows, and other products responsibly, keeping durability, functionality, and the real needs of users in mind.

Equally important to us is an ethical approach to complaints, returns, and after-sales service. We believe that consumer rights are too often limited by unclear clauses, fine print, and difficult procedures, which is why at ONSEN® we focus on transparent rules.

To meet customer expectations and with full confidence in the durability of our products, we offer long warranty periods. In the case of the Osaka Air foam mattress, the most important is the warranty covering its core, which is responsible for support, resilience, and sleep comfort.

Our warranty periods include:

15 years on the Osaka Air mattress core;
2 years on the Osaka GRID™ mattress core;
10 years on the cores of Asana, Enso, and Hiro orthopedic pillows;
2 years on the cores of Asana GRID™, Enso GRID™, and Hiro GRID™ orthopedic pillows;
2 years on the filling of classic pillows;
2 years on mattress covers;
2 years on pillowcases;
2 years on bed linen;
2 years on bed sheets;
2 years on mattress protectors;
2 years on furniture;
2 years on all other products.

The 15-year warranty period for the Osaka Air mattress core is no coincidence. It is a timeframe that reflects the high durability of the foams used and the design assumptions of a mattress intended for long-term, everyday home use.

The Osaka Air mattress core is made of high-quality foams with carefully selected density, firmness, and resilience. As a result, the mattress can retain its performance properties for years, including stable body support, elasticity, comfort, and resistance to typical deformations.

Mattress durability is also influenced by proper use. It is important to use a suitable bed frame, ensure proper ventilation, regularly care for the cover, and use the mattress in accordance with the user manual. This approach helps maintain sleep comfort over a long time.

The Osaka Air mattress we offer can still retain its shape and properties after the 15-year warranty period if it has been properly used and cared for. At the same time, after such a long period, replacing the mattress is a reasonable decision for hygienic reasons.

Therefore, the 15-year warranty on the Osaka Air mattress core is not only a declaration of quality but also a clear signal that ONSEN® creates products with a long-term perspective in mind. It is a guarantee for those who want to buy a durable foam mattress, use it for years, and have the peace of mind that the manufacturer takes full responsibility for its solutions.

Two covers for the perfect mattress This section presents two covers available for the Osaka Air foam mattress: the PREMIUM cover and the CURE™ cover, their properties, elasticity, breathability, anti-slip coating, and washability.

Introduction to the feature: two covers available for the Osaka Air mattress

When choosing the size of the Osaka Air mattress, you can also decide on the type of cover included in the set. Two variants are available: PREMIUM and CURE™. Both feature an anti-slip coating, high elasticity, and a design that supports comfort and mattress ventilation.

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How do the PREMIUM and CURE™ covers differ? This expanded section describes the PREMIUM and CURE™ covers for the Osaka Air mattress, their intended use, 550 g/m2 material, breathability, elasticity, side ventilation panels, anti-slip bottom, zipper, and washability.

The PREMIUM cover is the best choice for those who value comfort, elasticity, and excellent breathability. Its structure supports air circulation, helps wick away moisture, and allows you to fully benefit from the ventilation properties of the Osaka Air mattress.

The CURE™ cover was created for people who expect additional support for sleep hygiene. The CURE™ technology uses nanocapsules with probiotics that help neutralize allergens, making it a particularly good choice for allergy sufferers and those who care about a cleaner sleep environment.

All Osaka Air mattresses are equipped with a functional mattress cover, designed by specialists collaborating with ONSEN®. Its construction was developed to support durability, ease of use, mattress stability, and everyday sleep comfort.

Each cover for the Osaka Air mattress works in tandem with the layered structure of the core, without limiting its elasticity. Thanks to the multi-directional stretch of the material, it helps to evenly distribute physical forces, which is important for the comfort of couples and people who frequently change positions during sleep.

We manufacture the covers from a modern fabric with a weight of 550 g/m². The material combines high elasticity, durability, and a pleasant-to-touch texture, while its appropriate weave supports airflow and helps maintain a comfortable sleep surface for a long time.

The side panels of the cover are made of a unique ventilation mesh, which is an important element of the system for dissipating heat and moisture outside the mattress. This solution supports the breathability of the Osaka Air mattress, while simultaneously distinguishing it aesthetically from classic foam mattresses.

The bottom part of the mattress covers is coated with a special anti-slip layer. It helps to reduce the mattress from shifting on the slat base, bed frame, or other stable surfaces, increasing safety, convenience, and comfort of everyday use.

Every Osaka Air mattress cover is equipped with a practical zipper, which allows for easy removal and washing according to the instructions on the care label. This makes it easier to maintain sleep hygiene, mattress freshness, and long-lasting comfort of use.

Safety of mattress foams This section presents the safety of foams used in the Osaka Air foam mattress, their origin, transparent parameters, certificates, and the high quality of materials used by ONSEN.

Introduction to the feature: safety of foams in the Osaka Air mattress

For the production of the Osaka Air mattress, we use proven highly elastic HR foams and thermoelastic V foam from renowned manufacturers. These are safe materials with transparent technical parameters, allowing you to consciously evaluate the quality, durability, and functionality of the mattress.

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Why are the foams in the Osaka Air mattress safe and transparent? This expanded section describes the safety of foams in the Osaka Air mattress, the origin of substrates, the quality of HR and V foams, transparency of parameters, HR30100, V50075, HR35120, and HR50160 designations, and ONSEN's objection to hiding technical data of mattresses.

The substrates for the production of foams used by ONSEN® come primarily from BASF Germany, one of the most respected manufacturers of chemical raw materials in the world. We choose proven, repeatable, and safe materials because the quality of foams has a direct impact on the comfort, durability, and hygiene of sleep.

For the production of the Osaka Air mattress, we exclusively use highly elastic and thermoelastic foams that meet high quality requirements. The foaming process takes place in Poland, with the exception of the red highly elastic foam imported from Germany. This gives us control over the quality, repeatability, and safety of the materials.

While polyurethane foams with lower parameters could be a cheaper alternative, they do not meet ONSEN® standards. That is why the Osaka Air mattress is not the cheapest mattress on the market, but it is a smart choice for people who want to pay for real quality, not for middlemen's margins.

The development of the Osaka Air mattress took several years. During this time, we utilized the knowledge of specialists in ergonomics, physiotherapy, orthopedics, neurology, psychology, and materials technology. The goal was to create the best mattress, one that not only looks good in the description but actually does its job during sleep.

After years of testing prototypes, we developed a layout of four foam layers that provides stable support, elasticity, pressure point reduction, and high breathability. Thanks to this, the Osaka Air foam mattress combines the comfort of contouring with safety of use and the freedom to change positions.

We have nothing to hide, which is why we do not use incomprehensible trade names that make it difficult for customers to assess the quality of the mattress. Instead, we provide specific foam designations, such as HR30100, V50075, HR35120, and HR50160. This allows you to better understand what the Osaka Air mattress is truly made of.

For example, the lowest layer of the Osaka Air mattress is 10 centimeters thick and is made of open-cell highly elastic HR50160 foam. This designation indicates a density of approximately 50 kg/m³ and a firmness of approximately 160 N, which are crucial parameters for stability, durability, and the quality of support.

We oppose hiding the physical parameters of foams used in mattresses. We believe that the customer has the right to know what materials are used to make the product they will sleep on for many years. That is why ONSEN® consistently focuses on transparency, safety, and responsible communication instead of marketing names devoid of real substance.

A mattress for sleeping in any position This section presents the Osaka Air foam mattress as a universal mattress for sleeping on the side, back, and stomach, with a firmness of approximately 6.5/10 and medium-firm support.

Introduction to the feature: the Osaka Air mattress for sleeping in any position

The Osaka Air foam mattress has a universal firmness of approximately 6.5/10, ensuring comfortable sleep on the side, back, and stomach. It is a medium-firm bedroom mattress that combines stable spinal support, elasticity, and the freedom to change positions during sleep.

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Why is the Osaka Air suitable for the side, back, and stomach? This expanded section describes why the Osaka Air mattress works well when sleeping on the side, back, and stomach. It explains the importance of the 6.5/10 firmness, the limitations of the H1-H4 scale, the lack of standardization in mattress firmness ratings, and ONSEN's approach to national standards.

In Poland, mattress firmness ratings such as H1, H2, H3, H4, and sometimes even H5, are still widely used. The problem is that this scale has no uniform standardization. This means that an H3 mattress from one manufacturer can be completely different from an H3 mattress from another brand.

At ONSEN®, we believe that mattress firmness should be described more precisely than just with an H symbol. That is why we also use a numerical scale and the physical parameters of the foams, because these are what truly affect support, elasticity, durability, and the feeling of comfort during sleep.

However, assuming that the H3 designation means a medium-firm mattress, the Osaka Air is a true H3 mattress. But this does not mean it will be the same as every H3 mattress a customer knows from another store. The lack of common standards makes comparing just the H1-H4 symbols misleading.

Therefore, ONSEN® consistently points out the need to create national standards for grading mattress firmness. Customers should be able to fairly compare products, rather than base their decision on imprecise symbols that every manufacturer can interpret differently.

A key factor when choosing a mattress should not only be the user's weight, but also their preferred sleep position. Pressure is distributed differently when sleeping on the side, differently on the back, and yet differently on the stomach. A good mattress should support the body in each of these positions.

The traditional H1-H4 scale often suggests that lighter people should choose softer mattresses, and heavier people firmer ones. However, this is an oversimplification. For the spine, what matters most is stable, elastic, and even support that helps reduce points of excessive pressure.

The Osaka Air mattress has a firmness of approximately 6.5/10, providing a medium-firm feel. This level of firmness strikes a balance between comfortable contouring and stable body support. As a result, the Osaka Air mattress works perfectly as a mattress for sleeping on the side, back, and stomach.

When sleeping on the side, a mattress should relieve pressure on the shoulders and hips. When sleeping on the back, it should stabilize the lumbar region. When sleeping on the stomach, it should prevent excessive sinking of the pelvis. The Osaka Air was designed by specialists to support these needs in one universal model.

That is why when choosing the Osaka Air foam mattress, you do not have to look for a separate mattress for each sleep position. You get a medium-firm, elastic, and breathable bedroom mattress that supports freedom to change positions, stable spinal support, and comfortable regeneration all night long.

Mattress for allergy sufferers This section presents the Osaka Air foam mattress as a mattress for allergy sufferers, made of hypoallergenic foams and materials that support a hygienic sleep environment.

Introduction to the feature: the Osaka Air mattress for allergy sufferers

For the production of the Osaka Air mattress, we use safe and hypoallergenic materials that make it easier to maintain hygienic sleep conditions. Thanks to breathable foams, a removable cover, and the CURE™ variant, the mattress supports the comfort of allergy sufferers.

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Why is the Osaka Air a good mattress for allergy sufferers? This expanded section describes why the Osaka Air mattress is a good choice for allergy sufferers. It explains the importance of hypoallergenic foams, a breathable design, a removable cover, CURE™ technology, the absence of natural organic inserts, and easier maintenance of sleep hygiene.

In the production process of the Osaka Air mattress, we use exclusively proven foams and textile materials that have been selected with safety, durability, and sleep hygiene in mind. This is especially important for allergy sufferers, people with sensitive skin, and users who expect a clean and breathable recovery environment.

All layers of the Osaka Air mattress are made of foams with an open-cell structure, which supports airflow and helps limit moisture accumulation. This makes the mattress easier to keep in hygienic conditions, and its interior does not promote overheating or retaining excess heat.

The cover for the Osaka Air mattress is hypoallergenic, elastic, and easy to keep clean. It can be removed and washed according to the instructions on the care label, which helps remove impurities, dust, sweat, pollen, and other factors that can worsen the sleep comfort of people sensitive to allergens.

Unlike mattresses with natural organic inserts, the Osaka Air mattress does not contain straw, buckwheat, coconut, or other plant-based materials, which have a porous structure. Such components can absorb moisture over time, crumble, or create an environment that is less predictable in terms of hygiene.

The lack of organic fillings in the mattress core means a lower risk of problems typical for some natural inserts, such as the development of microorganisms, mold, or insects. The Osaka Air mattress is based on modern foams that are stable, breathable, and easier to quality control.

Spring mattresses and constructions with numerous closed spaces can make it difficult to maintain even hygiene and breathability. In the Osaka Air mattress, we used highly elastic HR foams, thermoelastic foam placed in the second layer, ventilation channels, and Aero 3D mesh, all of which support a fresher sleep microclimate.

For those expecting even greater support for sleep hygiene, the CURE™ cover is available. The CURE™ technology uses nanocapsules with probiotics that help neutralize allergens and support a cleaner sleep environment, which is especially important for allergy sufferers and people sensitive to house dust mites.

That is why the Osaka Air foam mattress is a good choice for people looking for a mattress for allergy sufferers, a hypoallergenic mattress, or a breathable mattress for everyday sleep. It combines safe materials, easier care, high ventilation, and the option to choose the CURE™ cover, supporting healthy and hygienic rest.

Non-rolled mattress This section presents the Osaka Air foam mattress as a non-rolled mattress, packaged without compression and folded into a horseshoe shape right before shipping to protect the foam structure and product durability.

Introduction to the feature: non-rolled Osaka Air mattress

At ONSEN®, we never roll the Osaka Air mattresses. Instead, we fold them into a horseshoe shape and pack them right before shipping. This protects the foam structure, minimizes the risk of permanent deformation, and ensures the mattress retains its full functionality from the very first use.

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Why don't we roll the Osaka Air mattress? This section describes why the Osaka Air mattress is not rolled or compressed before shipping. It explains the impact of rolling on foam cells, mattress durability, its height, shape recovery, and the advantage of horseshoe folding right before delivery.

Many customers ask not only which mattress to choose but also why a mattress should not be heavily compressed and rolled before shipping. The answer is simple: such packaging can degrade the quality of the mattress, weaken the foam structure, and shorten its actual lifespan.

A mattress that remains compressed and rolled in a box for a long time is subjected to excessive mechanical stress. Polyurethane foams, even of high quality, have a cellular structure that should not be kept in an extremely compressed state for days or weeks.

In practice, excessive compression can lead to the damage of some foam cells, a deterioration of its resilience, and a weaker recovery to its original shape. That is why some rolled mattresses take a long time to regain their height after unpacking, and sometimes remain too flat or uneven.

The problem stems from the fact that the machines used for rolling mattresses apply a massive amount of pressure. For the manufacturer, such packaging is logistically convenient because it reduces the volume of the shipment. For the user, however, it can mean a compromise in terms of durability, stability, and support quality.

The Osaka Air foam mattress was designed to be a durable, breathable, and highly functional product, which is why we refuse to damage its structure at the packaging stage. At ONSEN®, we choose a safer solution for the foams: a mattress folded into a horseshoe shape, rather than heavily compressed and rolled.

We pack the Osaka Air right before shipping. Thanks to this, the mattress does not spend a long time in a state of extreme compression, and its layers retain their proper resilience, height, and working capability. This is crucial for sleep comfort, spinal support, and the long lifespan of the mattress core.

Unlike many rolled mattresses, the Osaka Air mattress can be used almost immediately after taking it out of the packaging. You do not have to wait hours or days for the mattress to regain its proper shape because it has not been subjected to an aggressive compression process.

This type of packaging also facilitates the safe storage of the mattress before unboxing. Thanks to the high-quality foams and the lack of rolling, the Osaka Air mattress can retain its properties even if it remains in its packaging for some time. This is yet another example of ONSEN® choosing solutions that are beneficial for the user, rather than solely convenient for logistics.

An unapologetically perfect mattress.
Osaka Air.

Two body types. One choice.

THE HIGHEST QUALITY OF ONSEN® This section presents the quality of ONSEN as a Polish manufacturer of mattresses, orthopedic pillows, anti-allergic bedding, and ergonomic furniture designed with functionality, sleep ergonomics, and reliable consumer education in mind.

Description of the quality of the ONSEN brand as a Polish manufacturer of the Osaka Air mattress, orthopedic pillows, anti-allergic bedding, and ergonomic furniture.

ONSEN® is a Polish manufacturer, known for the innovative and functional Osaka Air foam mattress, as well as a whole range of products supporting the ergonomics of sleep and everyday life. We also create orthopedic pillows, mattress protectors, bedding, and ergonomic furniture, which are appreciated by an increasing number of customers from Poland, Europe, and all over the world.

Our goal is to provide reasonable people with reliable knowledge so they can consciously challenge the status quo in the sleep industry. By thinking differently, we create together with them a new reality based on functional, transparent, and uncompromisingly designed products.

Get to know the history of customers,
who trusted ONSEN® products

Hybrid mattress Osaka GRID™

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Meet the best
Osaka Air mattress This section presents the Osaka Air foam mattress as a modern sleeping mattress by the Polish brand ONSEN, designed for comfort, ergonomics, breathability, and the customer's conscious choice.

A description encouraging the choice of the Osaka Air mattress as the best foam mattress for people seeking comfort, spinal support, and the ability to test it at home for 100 days.

Your curiosity has led you to a place where you no longer have to settle for a random mattress. Before you is the Osaka Air foam mattress - an original ONSEN® design, created for those who are looking for the best sleeping mattress for themselves or their loved ones. It is a combination of ergonomic support, high breathability, durable foams, and comfort that you can test in your own bedroom. Order the Osaka Air mattress and test it for 100 days to see how a truly well-designed mattress should perform.

Buy the Osaka Air mattress designed for demanding and reasonable people This section describes the ONSEN brand Osaka Air foam mattress as a medium-firm sleeping mattress, designed for demanding users, with a firmness of 6.5/10, ergonomic spinal support, high breathability, a 100-day return policy, and a multi-year warranty.

The Osaka Air is an innovative medium-firm foam mattress, designed and manufactured by the Polish brand ONSEN® from Toruń. It is a mattress created for people who do not want to choose a random product, but are looking for a reasonable, durable, and ergonomic sleeping mattress. The Osaka Air is characterized by a firmness of approximately 6.5/10 according to the 10-point American mattress firmness scale we use. Assuming that H3 means a medium-firm mattress, it can be described as a true H3 mattress. However, it is important to remember that the Polish H1-H4 scale has no standardization, so an H3 mattress from one manufacturer can clearly differ from an H3 mattress from another brand.

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Our functional Osaka Air mattress was designed to maximize sleep comfort, provide stable body support, and keep the spine in the most physiological position possible. The layered mattress construction is no coincidence. Each layer performs a specific task, in accordance with the jobs to be done approach, to respond to the real needs of users: comfort, breathability, pressure point reduction, freedom to change positions, and durability over many years of use.

ONSEN® uses high-quality materials sourced from verified European suppliers. The foams and textiles we use meet rigorous quality requirements, including standards related to safety and production repeatability. The polyurethane foams have the CertiPUR safety certificate, and the textiles we use meet Oeko-Tex standards. Thanks to this, the Osaka Air is a mattress made of materials selected not only for comfort but also for the safety of everyday use.

The production process of every Osaka Air foam mattress, which takes place in Poland, is subject to quality control, allowing us to maintain manufacturing repeatability and reduce the risk of defects. We ensure that every piece meets ONSEN® standards, because a mattress is a product the user is in contact with for many hours every night. That is exactly why the Osaka Air was created for demanding, conscious, and reasonable people who expect more than marketing promises.

We primarily conduct direct sales, which allows us to eliminate middlemen costs, furniture store margins, and markups typical for many mattress stores. As a result, we can offer a premium mattress at a fair price, with a very good price-to-quality ratio. The Osaka Air is a true smart choice for people who want to pay for real quality, functionality, and durability, rather than multi-level distribution.

It is worth noting that ONSEN® products, including mattresses, orthopedic pillows, bedding, and ergonomic furniture, are covered by a multi-year manufacturer's warranty. In the case of the Osaka Air mattress core, the warranty is as long as 15 years. Additionally, a customer buying directly in the ONSEN® online store can take advantage of the option to return the mattress for up to 100 days from delivery. This allows you to test the mattress in natural conditions, in your own bedroom, without pressure from a salesperson and without the risk of a bad decision.

SHOP WITH CONFIDENCE
AND TEST FOR 100 DAYS

FREE DELIVERY

Standard delivery of mattresses, pillows, and other ONSEN® products within Poland is free, regardless of the order value! We offer delivery to European Union and European Economic Area countries at competitive prices, allowing other Europeans to discover their functionality.

EXPRESS SHIPPING

Orders placed with ONSEN® by 11:00 on weekdays are usually shipped the same day, and most orders reach customers within 48 hours. As manufacturers, we strive to properly secure inventory levels so that customers can enjoy our products as soon as possible.

TEST FOR 100 DAYS

ONSEN® is confident in the highest quality of its products, which is why we offer up to 100 days to return mattresses, pillows, furniture, and most other items you find in our range. You can test them at home or in the office, and then return them to receive a full refund for your order. Simple and transparent.

Discover
ONSEN® products

Foam mattress

Osaka Air

761,90 €

Orthopedic pillow

Asana

104,52 €

Orthopedic pillow

Hiro

118,81 €

Surface mattress

Airflow Mesh 3D Topper

66,43 €

Bed sheet

Skin+

116,43 €

Sleeping pillow

Skin+®

35,48 €

Anti-wrinkle pillowcase

Skin+®

25,95 €

Additional pillowcase

Asana

23,57 €

Additional pillowcase

Yoko

23,57 €

Additional pillowcase

Hiro

23,57 €

Single Set

with 90x200 mattress

945,00 €

756,00 €

Classic Set

with 120x200 mattress

1356,67 €

1085,33 €

Premium Set

with 160x200 mattress

1509,05 €

1207,24 €

Premium Set

with 200x200 mattress

1890,00 €

1512,00 €

Single Set

with 100x200 mattress

1059,29 €

847,43 €

Single Set

with 80x200 mattress

866,43 €

693,14 €

Orthopedic pillow

Enso

111,67 €

Additional pillowcase

Enso

23,57 €

Premium Set

with 180x200 mattress

1625,71 €

1300,57 €

Classic Set

with 120x200 mattress

1432,86 €

1146,29 €

Anatomical Chair

Seiza

356,90 €

Mattress cover

Premium

94,76 €

Additional service

Matress transport

47,38 €

Allergy-friendly bedding

Dani

156,43 €

132,96 €

Hypoallergenic pillowcase

Dani

14,05 €

Duvet cover

Dani

40,24 €

Mattress cover

Purotex

130,48 €

Sleeping pillow

CURE™

33,10 €

Anti-allergic pillowcase

Purotex®

23,57 €

Mattress protector

Mizu

113,10 €

Orthopedic pillow

Asana GRID™

161,67 €

Orthopedic pillow

Hiro GRID™

185,48 €

Orthopedic pillow

Enso GRID™

149,76 €

Hybrid mattress

Osaka GRID™

1723,57 €

Foam mattress

Osaka Air

3 200,00 PLN

Orthopedic pillow

Asana

439,00 PLN

Orthopedic pillow

Hiro

499,00 PLN

Surface mattress

Airflow Mesh 3D Topper

279,00 PLN

Bed sheet

Skin+

489,00 PLN

Sleeping pillow

Skin+®

149,00 PLN

Anti-wrinkle pillowcase

Skin+®

109,00 PLN

Additional pillowcase

Asana

99,00 PLN

Additional pillowcase

Yoko

99,00 PLN

Additional pillowcase

Hiro

99,00 PLN

Single Set

with 90x200 mattress

3 969,00 PLN

Classic Set

with 120x200 mattress

5 698,00 PLN

Premium Set

with 160x200 mattress

6 338,00 PLN

Premium Set

with 200x200 mattress

7 938,00 PLN

Single Set

with 100x200 mattress

4 449,00 PLN

Single Set

with 80x200 mattress

3 639,00 PLN

Orthopedic pillow

Enso

469,00 PLN

Additional pillowcase

Enso

99,00 PLN

Premium Set

with 180x200 mattress

6 828,00 PLN

Classic Set

with 120x200 mattress

6 018,00 PLN

Anatomical Chair

Seiza

1 499,00 PLN

Mattress cover

Premium

398,00 PLN

Additional service

Matress transport

199,00 PLN

Allergy-friendly bedding

Dani

657,00 PLN

Hypoallergenic pillowcase

Dani

59,00 PLN

Duvet cover

Dani

169,00 PLN

Mattress cover

Purotex

548,00 PLN

Sleeping pillow

CURE™

139,00 PLN

Anti-allergic pillowcase

Purotex®

99,00 PLN

Mattress protector

Mizu

475,00 PLN

Orthopedic pillow

Asana GRID™

679,00 PLN

Orthopedic pillow

Hiro GRID™

779,00 PLN

Orthopedic pillow

Enso GRID™

629,00 PLN

Hybrid mattress

Osaka GRID™

7 239,00 PLN

We create for people, not for shops!

Discover the most functional Osaka Air foam mattress and our other products!

Office chairs

Mattresses

Orthopedic pillows

Bedding sets for allergy sufferers

Hybrid mattress Osaka GRID™

Mattress description

Osaka GRID™ is an advanced and one-of-a-kind ONSEN® hybrid mattress that combines stable spinal support, high elasticity, intensive ventilation and innovative ONSEN® GRID™ technology

Dimensions of the mattress

Made-to-measure mattress

Mattress layers

Bed slats for the mattress

Mattress delivery and returns

Warranty for the mattress

Up to 100 days for returns

Learn more

Instructions for use

EUDAMED Data

Who is the Osaka Air foam mattress for?

Osaka Air or Osaka GRID™?

Match the mattress size ONSEN®

Why choose the Osaka Air foam mattress?

Key benefits of the Osaka Air foam mattress

What does the Osaka Air mattress offer in practice?

Ergonomic body support: Osaka Air acts as a modern mattress for the spine because it supports the natural alignment of the body during sleep. Its design helps reduce excessive sinking of the hips, shoulders, and lumbar region, which is crucial for back comfort and the quality of regeneration.

Durability for years: The four layers of high-quality foams have been selected to ensure resilience, stability, and resistance to deformation. Osaka Air is a mattress built for daily use over many years, not a random product from a catalog of ready-made solutions.

Original ONSEN® design: The Osaka Air mattress was designed from scratch by ONSEN® using design thinking and the jobs-to-be-done approach. It is a unique construction created in response to the real needs of users: comfort, support, breathability, durability, and freedom of movement during sleep.

A perfectly breathable mattress This section presents the Osaka Air foam mattress as a breathable sleeping mattress with a ventilation system, Aero 3D mesh, and a design that reduces overheating during sleep.

100-day mattress return policy This section presents the 100-day return policy for the Osaka Air mattress and explains why testing a mattress at home is more reliable than a quick test in a physical store.

A mattress for the whole family This section presents the Osaka Air foam mattress as a universal family mattress, suitable for various sleep positions, different body types, and users with diverse needs.

Ideal spinal support This section presents the Osaka Air foam mattress as a mattress providing ergonomic spinal support, physiological body alignment, and pressure point reduction during sleep.

A full 15-year mattress warranty This section presents the warranty for the Osaka Air foam mattress, including a 15-year warranty on the mattress core and a 2-year warranty on the mattress cover.

Two covers for the perfect mattress This section presents two covers available for the Osaka Air foam mattress: the PREMIUM cover and the CURE™ cover, their properties, elasticity, breathability, anti-slip coating, and washability.

Safety of mattress foams This section presents the safety of foams used in the Osaka Air foam mattress, their origin, transparent parameters, certificates, and the high quality of materials used by ONSEN.

A mattress for sleeping in any position This section presents the Osaka Air foam mattress as a universal mattress for sleeping on the side, back, and stomach, with a firmness of approximately 6.5/10 and medium-firm support.

Mattress for allergy sufferers This section presents the Osaka Air foam mattress as a mattress for allergy sufferers, made of hypoallergenic foams and materials that support a hygienic sleep environment.

Non-rolled mattress This section presents the Osaka Air foam mattress as a non-rolled mattress, packaged without compression and folded into a horseshoe shape right before shipping to protect the foam structure and product durability.

THE HIGHEST QUALITY OF ONSEN® This section presents the quality of ONSEN as a Polish manufacturer of mattresses, orthopedic pillows, anti-allergic bedding, and ergonomic furniture designed with functionality, sleep ergonomics, and reliable consumer education in mind.

Get to know the history of customers,
who trusted ONSEN® products

Meet the best
Osaka Air mattress This section presents the Osaka Air foam mattress as a modern sleeping mattress by the Polish brand ONSEN, designed for comfort, ergonomics, breathability, and the customer's conscious choice.

Discover
ONSEN® products

We create for people, not for shops!

Discover the most functional Osaka Air foam mattress and our other products!

ONSEN® is a Polish manufacturer of mattresses, pillows, bedding and furniture.

Hybrid mattress Osaka GRID™

Mattress description

Osaka GRID™ is an advanced and one-of-a-kind ONSEN® hybrid mattress that combines stable spinal support, high elasticity, intensive ventilation and innovative ONSEN® GRID™ technology

Dimensions of the mattress

Made-to-measure mattress

Mattress layers

Bed slats for the mattress

Mattress delivery and returns

Warranty for the mattress

Up to 100 days for returns

Learn more

Instructions for use

EUDAMED Data

Who is the Osaka Air foam mattress for?

Osaka Air or Osaka GRID™?

Match the mattress size ONSEN®

Why choose the Osaka Air foam mattress?

Key benefits of the Osaka Air foam mattress

What does the Osaka Air mattress offer in practice?

Ergonomic body support: Osaka Air acts as a modern mattress for the spine because it supports the natural alignment of the body during sleep. Its design helps reduce excessive sinking of the hips, shoulders, and lumbar region, which is crucial for back comfort and the quality of regeneration.

Durability for years: The four layers of high-quality foams have been selected to ensure resilience, stability, and resistance to deformation. Osaka Air is a mattress built for daily use over many years, not a random product from a catalog of ready-made solutions.

Original ONSEN® design: The Osaka Air mattress was designed from scratch by ONSEN® using design thinking and the jobs-to-be-done approach. It is a unique construction created in response to the real needs of users: comfort, support, breathability, durability, and freedom of movement during sleep.

A perfectly breathable mattress This section presents the Osaka Air foam mattress as a breathable sleeping mattress with a ventilation system, Aero 3D mesh, and a design that reduces overheating during sleep.

100-day mattress return policy This section presents the 100-day return policy for the Osaka Air mattress and explains why testing a mattress at home is more reliable than a quick test in a physical store.

A mattress for the whole family This section presents the Osaka Air foam mattress as a universal family mattress, suitable for various sleep positions, different body types, and users with diverse needs.

Ideal spinal support This section presents the Osaka Air foam mattress as a mattress providing ergonomic spinal support, physiological body alignment, and pressure point reduction during sleep.

A full 15-year mattress warranty This section presents the warranty for the Osaka Air foam mattress, including a 15-year warranty on the mattress core and a 2-year warranty on the mattress cover.

Two covers for the perfect mattress This section presents two covers available for the Osaka Air foam mattress: the PREMIUM cover and the CURE™ cover, their properties, elasticity, breathability, anti-slip coating, and washability.

Safety of mattress foams This section presents the safety of foams used in the Osaka Air foam mattress, their origin, transparent parameters, certificates, and the high quality of materials used by ONSEN.

A mattress for sleeping in any position This section presents the Osaka Air foam mattress as a universal mattress for sleeping on the side, back, and stomach, with a firmness of approximately 6.5/10 and medium-firm support.

Mattress for allergy sufferers This section presents the Osaka Air foam mattress as a mattress for allergy sufferers, made of hypoallergenic foams and materials that support a hygienic sleep environment.

Non-rolled mattress This section presents the Osaka Air foam mattress as a non-rolled mattress, packaged without compression and folded into a horseshoe shape right before shipping to protect the foam structure and product durability.

THE HIGHEST QUALITY OF ONSEN® This section presents the quality of ONSEN as a Polish manufacturer of mattresses, orthopedic pillows, anti-allergic bedding, and ergonomic furniture designed with functionality, sleep ergonomics, and reliable consumer education in mind.

Get to know the history of customers, who trusted ONSEN® products

Meet the best Osaka Air mattress This section presents the Osaka Air foam mattress as a modern sleeping mattress by the Polish brand ONSEN, designed for comfort, ergonomics, breathability, and the customer's conscious choice.

Discover ONSEN® products

Newsletter - stay up to date!

We create for people, not for shops!

Discover the most functional Osaka Air foam mattress and our other products!

ONSEN® is a Polish manufacturer of mattresses, pillows, bedding and furniture.

Get to know the history of customers,
who trusted ONSEN® products

Meet the best
Osaka Air mattress This section presents the Osaka Air foam mattress as a modern sleeping mattress by the Polish brand ONSEN, designed for comfort, ergonomics, breathability, and the customer's conscious choice.

Discover
ONSEN® products