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BLOG ONSEN® / About Mattresses

Outstanding breathability and stable support? Meet the Osaka GRID™ mattress

15 czerwca 2026

Contents

Spring-free hybrid mattress - a new definition of comfort

ONSEN® GRID™ is the heart of the Osaka GRID™ mattress

Thoughtful construction - GRID™ and foams working as one system

Stable support without the feeling of sleeping on a hard board

Point elasticity instead of rigid comfort zones

Breathability that truly matters in a mattress

Osaka GRID™ doesn't need springs - and neither do you

No latex, no coconut fibres and no industry myths

The Osaka GRID™ mattress is made for you - see for yourself

Mizu - the mattress protector that protects and lets your mattress breathe

100-night trial - because you don't choose a mattress in a showroom

A smart choice without unnecessary middlemen

ONSEN® is a modern brand for conscious consumers

Don't fall for mattress myths - choose wisely

Reasonable people know that choosing the right mattress should not start with discounts, sales advice or an attractive photo. They also understand that a good mattress is not a bedroom decoration, but a tool for daily recovery that should support the body for many hours every night. The role of a mattress is to reduce excessive pressure points while helping maintain a comfortable sleeping position.

In a consumer-unfriendly world filled with marketing slogans, it is becoming increasingly difficult to distinguish real innovation from well-packaged mediocrity. Some talk about springs, coconut fibres or latex, while others repeat mantras about comfort zones or magical firmness levels. Fortunately, the conscious consumer is increasingly asking not what sounds appealing, but what actually works and what truly determines a mattress's functionality.

This way of thinking led to the creation of the Osaka GRID™ mattress by the Polish company ONSEN®. It is a modern spring-free hybrid mattress of a new generation that combines the proprietary ONSEN® GRID™ layer with high-quality HR foam. Its purpose is not to replicate concepts commonly found in traditional stores, but to create a stable, resilient and breathable mattress that serves as an ideal sleep surface.

Osaka GRID™ is designed for people who want more than a traditional foam mattress without returning to spring-based constructions. It is a mattress for those who expect stronger support, freedom of movement, effective ventilation and honest technology that can be explained logically.

Spring-free hybrid mattress - a new definition of comfort

For years, the term hybrid mattress was used mainly for constructions combining foams with springs. It sounded modern, although in practice it very often simply meant a classic pocket spring mattress covered with several layers of foam. Such a product could look impressive in cross-section, but it was still based on metal elements that work in a limited way.

Osaka GRID™ shows that a hybrid mattress can mean something completely different. In this case, it is not about combining materials with steel, but about combining the ONSEN® GRID™ layer with high-resilience foams. This solution preserves stability, dynamics and point-by-point pressure response, while also eliminating many limitations typical of pocket spring mattresses.

This construction follows the ONSEN® philosophy, which is not about copying competitors, but about asking simple and uncomfortable questions. Are springs in a mattress really sensible and necessary? Does the number of layers in a mattress really matter more than their function? Should a mattress be comfortable for five minutes in a showroom or for many hours every night? Does the customer really need another slogan, or rather a functional mattress whose performance can be understood?

Osaka GRID™ is a mattress that answers these questions very specifically. Instead of a metal core, it offers elastic GRID™ technology and stabilizing HR foams. Instead of random sinking, the Osaka GRID™ mattress delivers a springy response. Instead of a heavy, closed construction, it focuses on breathability, increasing airflow to the absolute limit. That is why it can be said that the Osaka GRID™ mattress redefines the concept of a hybrid mattress.

ONSEN® GRID™ is the heart of the Osaka GRID™ mattress

The most important element of the Osaka GRID™ mattress is the ONSEN® GRID™ layer. It gives the mattress its unique character and makes this comfortable mattress clearly different from traditional mattresses. GRID™ technology is not a marketing add-on or a decorative layer designed simply to look good in photos. It is a fully functional part of the mattress construction that is responsible for the mattress's initial response to pressure.

The ONSEN® GRID™ layer has been designed to combine resilience, point elasticity and outstanding airflow, outperforming other mattresses. In practice, this means the mattress responds dynamically exactly where the body applies pressure, without creating a sinking sensation. It is ideal for people who do not like traditional memory foams, which are not suitable for the top layers of a mattress.

Another major advantage of GRID™ is its three-dimensional structure, which allows air to move more freely across the surface of the mattress, precisely where users are most likely to experience overheating. After all, sleep comfort does not depend solely on mattress firmness. If a mattress traps heat and moisture and the body starts tossing and turning, sleep can become lighter and less restorative. Our hybrid mattress reduces this risk.

That is why the ONSEN® GRID™ mattress is more than just another layer inside a mattress. It is a technology that successfully combines responsive support with excellent breathability, while eliminating the need for springs. For people looking for a modern mattress without metal components, this is a compelling advantage.

Thoughtful construction - GRID™ and foams working as one system

Everyone should know that a good mattress is not created by randomly stacking several materials on top of each other, although unfortunately this happens very often in this industry. Each layer should have a specific purpose, and the whole structure must work as a coherent system. In Osaka GRID™, the upper ONSEN® GRID™ layer is responsible for springy response, surface adaptation and ventilation, while high-resilience HR foams stabilize the body and strengthen support.

This is very important, because comfort cannot end with the first impression. A mattress that feels pleasant for only a few minutes often turns out to be problematic after a full night. The body needs not only softness at the surface contact point, but also stable support deeper inside. That is why in the Osaka GRID™ mattress, the technological layer works together with HR foams, which very effectively limit excessive compression and help maintain a stable body position.

High-resilience HR foams are a dynamic and elastic material, while also being highly resistant to everyday loads. Unlike T foams, they do not passively collapse under body weight, but actively respond to pressure. This makes Osaka GRID™ not a soft and sluggish mattress, but a stable and resilient one, ready for position changes during sleep.

This construction shows that what matters in a mattress is not the number of layers, but the purpose behind using them. ONSEN® does not add materials to a mattress just to make the product description longer. Every element must serve a function, because GRID™ provides a resilient surface and breathability, while HR foams provide stabilization, durability and progressive support.

Stable support without the feeling of sleeping on a hard board

One of the biggest mistakes when choosing a mattress is confusing stable support with absolute firmness. As our mattress buying guide explains, many people, after years of sleeping on a surface that is too soft and sinks too much, start looking for a very firm mattress because they associate firmness with spinal protection. The problem is that an overly hard surface can create excessive pressure on the shoulders, hips and other parts of the body.

The Osaka GRID™ mattress has a firmness of around 7.0/10 on the American scale, which on the Polish market can be roughly associated with the H4 mattress designation, but only as a general reference. It is important to remember that popular labels such as H1, H2, H3, H4 or H5 are not uniformly standardized. Two mattresses described as H4 mattresses can behave completely differently in practice.

That is why, in the case of the Osaka GRID™ mattress, the quality of support matters more than the firmness label itself. This mattress has a stronger, stable character, but it does not feel like a hard board. The polymer ONSEN® GRID™ layer allows point-by-point response where the body applies pressure, while the HR foams stabilize the deeper parts of the construction.

This solution will be appreciated by rational people who do not want to sink into the mattress, but at the same time do not want to sleep on a rigid surface comparable to a board. Osaka GRID™ is a mattress that gives the user a sense of control, resilience and stability that is hard to find in other mattresses.

Point elasticity instead of rigid comfort zones

When you are wondering which mattress to choose, you will often find claims on the broad mattress market about seven, nine or even more zones, usually called comfort zones. To the average consumer, this sounds technical and convincing, but in practice it raises many doubts. By nature, a person does not sleep motionless like a model on display. A typical mattress user changes position during the night, moves, turns and curls up their legs, sometimes sleeping closer to the edge and sometimes in the center of the mattress.

Comfort zones assume that shoulders, hips, lumbar area and legs are always located in specific places on the mattress. This idea would make sense only if all people had the same height and the same body shape, and also slept in one position throughout the entire night. In reality, that is not the case. That is why ONSEN® chooses point elasticity instead of artificially dividing the mattress into zones.

In the Osaka GRID™ mattress, point elasticity comes from combining the ONSEN® GRID™ layer with high-resilience HR foams. This modern mattress responds exactly where pressure appears, not according to a predefined pattern. This is more logical, because adaptation happens in relation to the actual position of the body, not a catalogue silhouette.

This approach also matters for couples, because when one person changes position, the other should not feel that movement like a wave passing through the entire bed. The construction without classic springs, based on GRID™ technology and HR foams, helps reduce motion transfer and increases comfort when sleeping together. This is not magic, but the natural consequence of well-designed elasticity.

Breathability that truly matters in a mattress

Some people treat mattress breathability as a secondary parameter, although for many users it is precisely this feature that determines sleep comfort. If your current mattress traps heat, poorly removes moisture and creates a stuffy feeling, even good firmness may not be enough. You start tossing and turning, uncovering yourself, changing position and waking up, although you may not immediately connect it with the mattress.

That is why our Osaka GRID™ mattress was designed with high airflow in mind. The ONSEN® GRID™ layer has a spatial structure that supports air movement near the body surface. This sets it apart from many closed materials that may feel pleasant for a while, but often start trapping heat after several hours of sleep.

Mattress ventilation matters not only for thermal comfort, but also for hygiene. Heat and moisture are not things we want to lock inside the mattress, or at least we should not want to. Of course, no mattress can replace regular bedroom airing, washing bedding and keeping things clean, but a well-designed construction can support these habits. The Osaka GRID™ hybrid mattress does exactly that through its open and breathable structure.

Breathability is not an add-on to ergonomics, but part of it. A body that does not overheat at night has much better conditions for rest than one that does. A mattress that allows air to move more freely helps maintain a comfortable sleep environment - without empty promises, exaggeration or miracles.

Osaka GRID™ doesn't need springs - and neither do you

In the past, springs were considered a symbol of every solid mattress. For many people, a relatively heavy pocket spring mattress still sounds more serious than a foam-based or technology-based construction. The problem is that weight and the presence of metal are not proof of quality in themselves. A spring is only one of several possible construction solutions, not a guarantee of ergonomics.

A pocket spring mattress works mainly thanks to springs placed in textile pockets. Of course, each of them compresses under pressure, but the entire structure is connected with other layers and enclosed in a specific system. As a rule, springs work mainly vertically, while the human body applies pressure to a mattress in a far more complex way. On a mattress, we turn, shift and lie at an angle, and even support ourselves with the shoulder, hip or knee.

The Osaka GRID™ mattress consciously gives up springs because it uses a better source of elasticity. Its ONSEN® GRID™ layer and HR foams make it possible to achieve springy response, stability and point-by-point adaptation without a metal core. There is no spring squeaking or risk of springs shifting, and no comfort built around a steel construction.

No latex, no coconut fibres and no industry myths

In the mattress industry, many materials have built up a legend greater than their actual function. For example, latex is often presented as luxurious and natural, pressed coconut fibre as healthily firm, and steel springs as irreplaceable. Meanwhile, a reasonable mattress choice should begin with the question of how a given material behaves in everyday use.

The Osaka GRID™ hybrid mattress does not need latex, coconut fibre or springs to provide stable support. Instead, it uses the ONSEN® GRID™ layer as well as high-resilience foams. The point is not to include fashionable materials in the mattress description, but to make sure that in reality every part of the mattress works for sleep comfort.

Coconut fibre may sound good in a story about a natural mattress, but in practice it is often a stiff insert that limits elasticity. Latex is also not always the best choice for every user, especially when breathability and dynamic response to position changes are priorities. That is why ONSEN® does not build a mattress out of popular slogans, but out of solutions that serve a specific function.

This approach clearly shows the difference between marketing and design, because marketing asks what is easy to sell. Reasonable design, on the other hand, asks what makes sense. Osaka GRID™ is now an exceptionally functional mattress created according to this second way of thinking. Its value does not come from trendy ingredients, but from combining GRID™ and HR foams for stability, breathability and point elasticity.

The Osaka GRID™ mattress is made for you - see for yourself

Osaka GRID™ is most often chosen by people who are looking for a stronger, stable and resilient mattress, but do not want to sleep on a hard board. It is a good choice for those who dislike excessive sinking, but also tend to overheat easily or frequently change position during sleep. Its character is more dynamic than that of many foam mattresses.

The mattress fits well with the needs of back, side and stomach sleepers, as well as those who sleep in mixed positions. When sleeping on the back, stable support for the pelvis and the lumbar spine is important. When sleeping on the side, what matters is controlled adaptation around the shoulder and hip, as well as maintaining a straight line of the spine and head. With frequent position changes, proper resilience matters, because the mattress should not make movement harder.

Mizu - the mattress protector that protects and lets your mattress breathe

Until recently, it was fair to say that many mattress protectors did more harm to comfort than good. Traditional waterproof pads often acted like a barrier, protecting against moisture while at the same time limiting airflow. As a result, they increased overheating and changed the feel of the mattress, ruining sleep comfort. With a well-ventilated mattress, such a mattress protector could simply kill one of its most important advantages.

That is why the arrival of the Mizu protector changes how we think about this product category. The Mizu pad we created is not an ordinary oilcloth hidden under a sheet. It is a specialist, yet waterproof and breathable mattress protector, designed so that the body does not lie directly on the membrane. That is why between the user and the waterproof layer there is a spatial 3D spacer fabric that creates a layer of air.

In practice, this means that Mizu protects the mattress against moisture, sweat, dirt and accidental spills, while at the same time not taking away its breathable character the way many classic protectors do. This is especially important with the Osaka GRID™ mattress, whose airflow is one of its key advantages. A protector should protect the mattress, not cancel out the purpose of its construction.

Mizu is therefore a logical addition to the Osaka GRID™ mattress for people who want to combine protection with comfort. It is especially worth considering with children, pets, spill risk and heavy sweating, but also when the user wants to extend the freshness and hygiene of the mattress without giving up breathability. This is an example of another innovation that solves a real problem.

100-night trial - because you don't choose a mattress in a showroom

One of the biggest myths in the mattress industry is the belief that the best choice is made in a physical store. In practice, lying on a display model for a few minutes has little to do with real sleep. The customer is dressed differently, is in an unfamiliar place and often feels pressure from the salesperson. Such a customer controls their movements while comparing several mattresses in a short time.

We believe that a mattress should be assessed where it is actually meant to work, which is in your own bedroom. Only then can you check whether your body responds well to the support provided by a given model. You can also see whether the mattress does not cause overheating, which may lead to night sweating. And whether morning pain appears, which may result from poor fit or simply be part of the adaptation process. No showroom can recreate the conditions of your bedroom, no matter how attractive the display looks.

That is why the option to test the Osaka GRID™ mattress for 100 nights is so important. It is a fairer sales model than a short test under a salesperson’s eye in a physical furniture store. The customer does not have to guess whether the mattress will be right for them, because they can find out empirically. They can simply test it in real conditions, on their own bed, under their own duvet and in their own sleep rhythm.

A smart choice without unnecessary middlemen

ONSEN® is based on a direct-to-consumer strategy, meaning directly from the brand to the customer. This matters because the traditional mattress industry has spent years getting consumers used to absurdities such as multi-level margins, showrooms, middlemen, distributors and promotions that say more about sales mechanics than about product quality.

By buying the Osaka GRID™ mattress directly from ONSEN®, the customer does not pay for an entire chain of middlemen. With us, they pay for the product, technology, materials and service, as well as the brand’s responsibility. They also have contact with a team of specialists who know the mattress construction and understand its function.

Remember that smart choice does not mean buying the cheapest product, but buying wisely. It means not overpaying for mattresses that do not improve sleep, including expensive displays, commissions, empty slogans, promotions or fake exclusivity. Osaka GRID™ is a premium mattress, but its value comes from a carefully thought-out construction.

This approach fits well with reasonable customers who want to understand their purchasing decisions. If someone expects only a discount and a short promise, they will probably be satisfied with any showroom slogan. But if they want to know how a mattress works and why it was built exactly this way, the Osaka GRID™ mattress is a product worth taking a closer look at.

ONSEN® is a modern brand for conscious consumers

If you are here, you probably know that ONSEN® is not trying to be a brand for everyone, but a brand for the chosen few. This is one of the things that sets us apart from many mattress manufacturers. Instead of speaking generally to everyone, we direct our message to people who want to know more, to our pack. To those who are not satisfied with the empty phrase best mattress, but ask what truly makes it different from others.

ONSEN® does not create mattresses only to sell more foam rectangles. The deeper goal is to change the way people think about sleep, ergonomics and shopping, and we do this together with you. Our company wants the customer to stop being a passive recipient of marketing and become a conscious participant in their decision.

Around ONSEN®, a pack of reasonable consumers is forming, a group of people connected by the fact that they truly want to sleep healthier, work healthier and live healthier, but without blind trust in advertising. It is a community based on knowledge, independent thinking and dislike of myths, especially anti-consumer ones. The Osaka GRID™ mattress fits very well into this way of thinking, because it is a mattress worth understanding, not just looking at.

Don't fall for mattress myths - choose wisely

The biggest problem when buying a mattress is not a lack of products, but an excess of conflicting information. The customer hears that a mattress must have springs because they are durable. Another time, they hear that a mattress must have latex because it is luxurious. Then they hear that coconut fibre is healthy because it is firm. They may also hear that the more comfort zones, the better. And finally, of course, that a mattress has to be chosen in a showroom, because only there can it be tested. Each of these claims may sound credible, but not all of them withstand rational analysis.

For years, ONSEN® has shown that a mattress should be judged by its function, not through the lens of marketing nonsense. As a rule, no material is good just because it is fashionable, but because it is functional. A steel spring does not guarantee support simply because it is a spring. Comfort zones do not become science just because there are seven of them. And firmness is not ergonomics if it is not followed by pressure distribution and point elasticity.

Our new Osaka GRID™ mattress is an answer to many of these myths. It is a mattress that has no springs, because it does not need them. It is also a mattress that is not based on coconut fibre, because stiffness alone is not a solution. This mattress does not pretend that one material can solve every problem. Instead, it combines ONSEN® GRID™ and HR foams to achieve breathability, support and an honest construction.

It is no secret that the best purchasing decision begins with knowledge, and buying a mattress is no exception. So if you understand for yourself the difference between firmness and support, breathability and empty claims, and home testing and lying on a display model, you become a more difficult customer for random salespeople. And that is a very good thing, because the mattress industry needs fewer myths and more common sense.

The Osaka GRID™ mattress is part of the broader mission of the ONSEN® brand.

The Polish manufacturer ONSEN® is a true rebel, because we are not a brand that wants to fit into the existing rules of the market. If that were the case, it would be enough to produce more mattresses very similar to the rest, then add a few attractive slogans and compete through promotions. But that does not change the way people sleep and buy, which is why at ONSEN® we prefer to shift the standards.

The Osaka GRID™ mattress we created is part of this mission. It shows and proves that a premium mattress does not have to be a spring or foam mattress. We prove that a mattress hybrid does not have to mean combining foam with steel. We show that mattress breathability can be designed structurally, not just declared in a description. And also that stable support does not have to mean sleeping on a hard board.

This is a product that fits well with the infinite game philosophy, because at ONSEN® we are not trying to win one quick sale, but to build trust, educate the market and develop products that make sense. ONSEN® does not have to tell everyone what they want to hear, but can say what is honest, even if it sometimes goes against industry habits.

If you are looking for a mattress that combines ONSEN® GRID™ technology, high-quality HR foams, stable support, breathability and a spring-free construction, the Osaka GRID™ mattress is a solution definitely worth getting to know. Not for five minutes in a showroom, but through real sleep in your own bedroom.

We also encourage you to read the other articles on the best blog about sleep and health, as well as the Encyclopedia of Healthy Sleep prepared by the ONSEN® team of specialists. For those who care about spinal health, we recommend a set of spine exercises prepared by a physiotherapist.

FAQ: Features and benefits of the Osaka GRID™ mattress

What makes the Osaka GRID™ mattress stand out?

The Osaka GRID™ mattress stands out thanks to its spring-free hybrid construction, combining ONSEN® GRID™ technology with high-resilience HR foams. As a result, it provides stable support, a responsive reaction to pressure, point elasticity and high breathability, without springs, latex or coconut fibre. It is probably the only mattress of its kind in the world.

Is Osaka GRID™ a spring mattress?

No, Osaka GRID™ is not a spring mattress. It is a spring-free hybrid mattress in which the ONSEN® GRID™ layer, combined with high-resilience HR foams, is responsible for elasticity, stability and point-by-point response. This construction eliminates the metal core, spring squeaking and the risk of springs shifting.

How firm is the Osaka GRID™ mattress?

The Osaka GRID™ mattress has a firmness of around 7/10, which roughly corresponds to the H4 designation. However, it is not a hard board, because the ONSEN® GRID™ layer responds point by point to pressure, while HR foams stabilize the body deeper inside. It is a mattress for people who want stronger support without excessive sinking.

Who is the Osaka GRID™ mattress for?

The Osaka GRID™ mattress is for people looking for a stable, resilient and breathable premium mattress. It works well for back, side and stomach sleepers, as well as mixed sleepers, especially when stronger support, freedom of movement and reduced overheating during sleep are important.

Why does the breathability of the Osaka GRID™ mattress matter?

The breathability of the Osaka GRID™ mattress matters because it affects thermal comfort and sleep hygiene. The spatial structure of ONSEN® GRID™ supports airflow near the body surface, helping reduce heat and moisture buildup. This makes the mattress better suited to people who dislike a stuffy feeling and overheating at night.

Contents

Spring-free hybrid mattress - a new definition of comfort

ONSEN® GRID™ is the heart of the Osaka GRID™ mattress

Thoughtful construction - GRID™ and foams working as one system

Stable support without the feeling of sleeping on a hard board

Point elasticity instead of rigid comfort zones

Breathability that truly matters in a mattress

Osaka GRID™ doesn't need springs - and neither do you

No latex, no coconut fibres and no industry myths

The Osaka GRID™ mattress is made for you - see for yourself

Mizu - the mattress protector that protects and lets your mattress breathe

100-night trial - because you don't choose a mattress in a showroom