Discover common myths about mattresses! |
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No, the flat hand test, commonly known as the hand test, makes no sense whatsoever. The hand test is useless and unreliable, especially on a memory foam mattress. It is just another trick that mattress sellers use to legitimize their unreliable knowledge.
The best mattresses are made from high-resilience foam with the right firmness and density. To ensure proper spinal and body contouring during sleep, it's worth making sure that the second layer of the mattress contains high-resilience foam. Traditional foams, which quickly and easily deteriorate, should be avoided.
The firmness of foam for mattresses is measured in kilopascals (kPa) or newtons (N). The firmness of polyurethane foam alone is not a sufficient parameter. These are always labeled alphabetically and numerically by manufacturers. High-resilience foams are labeled as HR, and viscoelastic foams as V. Closed-cell traditional foams are labeled with the letter T or HD. The first two digits after the letter designation indicate the density of the foam, and the next two or three digits indicate its firmness. For example, HR5030 foam would indicate high-resilience foam with a density of 30 kg/m3 and a firmness of 3.0 kPa. However, mattress firmness is also influenced by other factors, primarily the order of polyurethane foam layers and their parameters. Therefore, the final firmness of the mattress is determined on a 10-point scale. A medium-firm mattress, with a firmness rating of 6.5 on the mattress firmness scale, is considered the best for health and comfort.
Yes, a polyurethane foam mattress is the best type of mattress. However, it is always important to check the full parameter of the foam to ensure that it truly meets the conditions for healthy and comfortable sleep. Everyone has the right to know the composition of a mattress before purchasing it, just as they would for clothing or food products. The parameters of polyurethane foams are not a trade secret and must be disclosed.
A high-quality foam mattress, which contains polyurethane foams with high density and proper firmness, will not deteriorate even after several years of use. Of course, it should not be closed-cell foams, which are labeled with the letter T, but only high-resilience foams labeled as HR. It is also beneficial to have a layer of memory foam, which is labeled as V. The most functional mattresses, such as the Osaka Air, even come with a 15-year warranty. With proper use, a mattress can last even twice as long.
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