Pillow with thermoelastic filling - what are the manufacturers silent about?

• they respond instantly to movement, providing stable support for both back and side sleeping;
• they feature an open-cell structure, which improves airflow and reduces overheating;
• they do not change firmness depending on the room temperature;
• they are extremely durable and resistant to deformation.

Is a memory foam pillow healthy?

A memory foam pillow may seem like a healthy choice because marketing claims it adapts to the shape of your head and neck. In reality, however, it doesn't truly conform to the body - it simply envelops it by softening under body heat and weight. While it may feel supportive at first, after a while your head and neck can slip into a non-ergonomic position. Moreover, these pillows often lack proper ventilation and tend to retain heat, which can be uncomfortable - especially for people who sweat or suffer from allergies.

What are the drawbacks of memory foam pillows?

The main issue is the low resilience and viscous nature of the foam, which causes it to sink under pressure without offering upward support. As a result, the body isn't actively supported. The foam's dense structure also restricts airflow, leading to heat buildup and moisture retention. In cold environments, the pillow becomes hard, and in warm ones too soft - making it difficult to maintain stable support throughout the night.

What does it mean that a pillow has a memory foam core?

It means the core is made from a foam that reacts to heat and pressure. It's not a foam that actively supports the body, but one that softens with warmth. It creates a cocoon-like sensation but doesn’t provide real support. Once pressure is removed, it takes time to return to its original shape, so it doesn't adapt well to position changes during sleep.

Why is a memory foam pillow not recommended?

Because it contradicts the principles of ergonomic support. Instead of holding your head and neck in place, it lets them sink, which can lead to muscle tension, neck pain, and spinal misalignment. The poor airflow also leads to heat and moisture buildup, reducing sleep hygiene and potentially worsening allergies. Ultimately, it offers a temporary feeling of softness rather than true comfort and support.

What kind of pillow should you choose instead?

A better choice is a high-resilience (HR) foam pillow. This type of foam is springy, reacts instantly to movement, and doesn't depend on room temperature. Its open-cell structure ensures excellent ventilation and sleep hygiene. Unlike memory foam, HR foam provides real support, not just conformity. A great example is ONSEN® orthopedic pillows, which combine ergonomic design with premium materials for stable, healthy neck support all night long.