Viscoelastic material, also known as memory foam , is a special type of foam that responds to heat and pressure, conforming to the contours of the body. This unique material softens with body heat and slowly returns to its original shape when pressure is removed. Viscoelastic products are used in particular in mattresses and pillows to improve sleeping comfort and reduce pressure points.
What does viscoelastic material mean?
Viscoelastic material is a polyurethane foam with chemicals added to increase its density and viscosity. The material was originally developed in the 1960s by NASA to improve the safety of astronauts during spaceflight. The goal was to create a material that would absorb the effects of g-forces during launch and landing.
Viscoelastic material differs from traditional foams in terms of its chemical composition, especially due to its open-cell structure. This structure allows air to move within the material, which makes it a heat-sensitive material . Traditional foams are flexible and quickly return to their original shape, while viscoelastic material adapts slowly and retains its shape for a short time.
Memory foam entered consumer products in the 1990s, when manufacturing costs dropped sufficiently. Today, it is widely used in mattresses, pillows, cushions, and even shoes. The material's popularity is based on its ability to distribute pressure evenly and reduce pressure points, making it ideal for sleeping ergonomics.
How does a viscoelastic material work in practice?
The viscoelastic material works by being sensitive to heat. As the material warms up from body heat, it softens and conforms precisely to the body's contours. This process takes place within minutes, creating a personalized support surface for each sleeper.
Pressure distribution is another key feature. When you lie on a contoured mattress , your weight is distributed evenly across your entire body area, rather than the point-like pressure of a traditional mattress. This significantly reduces pressure on your shoulders, hips, and other protruding parts of your body.
The slow-rebound property distinguishes viscoelastic material from other mattress materials. When you get up from the mattress, the material slowly returns to its original shape, which is visible as a body mark that remains for a while. This property also allows for motion isolation, so that the movements of another sleeper do not disturb the one sleeping next to you.
The density and hardness of a material significantly affect its performance. A denser material provides better support and lasts longer, but may feel harder at first. Lower density materials are softer but wear out faster.
What are the benefits of viscoelastic material for the sleeper?
The pressure-relieving property is the most significant benefit of viscoelastic material. When the pressure is evenly distributed, blood circulation improves, especially in the extremities. This reduces the feeling of numbness and reduces the need to turn over during the night, which improves the quality of sleep.
The natural position of the spine is better maintained with a viscoelastic mattress. The material supports the body's curves and fills in the empty spaces, keeping the spine in a straight line. This is especially important for those who suffer from back problems or poor sleeping posture.
Couples especially appreciate the motion isolation. When one person turns or gets up during the night, the movement is not transmitted to the other side of the mattress. This property makes viscoelastic material an excellent choice for light sleepers or couples with different sleep rhythms.
From a hygiene perspective, viscoelastic products are excellent, as their dense structure prevents the accumulation of dust mites and allergens. Many manufacturers also treat their products with antibacterial agents, making them suitable for allergy sufferers and asthmatics.
Who is a viscoelastic mattress or pillow best suited for?
Those with back and neck pain will especially benefit from viscoelastic material. The viscoelastic pillow supports the natural curve of the neck and reduces tension in the shoulders. The mattress, in turn, adapts to the contours of the spine, providing individual support for each vertebra.
Side sleepers need extra support for their shoulders and hips. The viscoelastic material allows these areas to sink deeper into the mattress while maintaining a straight spine. This reduces pressure on the joints and improves sleeping ergonomics.
Body weight plays a role in material selection. Lighter sleepers need a softer material to enjoy its conforming properties. Heavier sleepers, on the other hand, benefit from a denser, more supportive material that doesn't bunch up too much.
Warm sleepers should note that viscoelastic material can feel warm. The material stores body heat, which can be uncomfortable in the summer. Nowadays, viscoelastic products with cooling gel layers are available to solve this problem.
Choosing a viscoelastic product - how to succeed
Density is the single most important factor when choosing a viscoelastic mattress . A quality mattress will have a density of at least 50 kg/m³, and premium products can have a density of up to 85 kg/m³. Higher density means better support and longer life, but also a higher price.
Certifications indicate the safety and quality of the material. The CertiPUR certification guarantees that the material is made without harmful chemicals. The OEKO-TEX Standard 100, on the other hand, ensures that the product has been tested for harmful substances and is safe for the skin.
The warranty period indicates the manufacturer's confidence in the product. High-quality viscoelastic mattresses are typically given a 5-10 year warranty. Durability depends on the density of the material, the amount of use and care. Regular turning and airing will extend the life of the mattress.
Sisustus1 offers a wide selection of high-quality ergonomic viscoelastic pillows for hotel-level sleeping comfort. At our Helsinki showroom, you can explore the different options and find the right solution for you, whether it's for your home, Airbnb or hotel.
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