Memory foam mattress is a kind of mattress that's produced from memory. Besides memory, it is also produced from other styles of chemicals. The compounds which are added to the bed foams allows the capability to increase in density to it. Memory foam mattress can be called viscoelastic polyurethane foam. The bed originated so that you can meet with with the demand of the bed customers. The Memory Foam Mattress' history could be traced back to NASA's Ames Research Center. The Ames Research Center of NASA borrowed a project to design a bed foam that can help to alleviate backpain of the astronauts due to g-forces in the 1970s. NASA considered that the foam product must be used to adapt to the design of your body. The person would eventually transfer of the positioning, although developing a form for that body can help to resolve the issue. About the body, inappropriate stress points will be formed as a result. Later, a way to create a foam that will evolve the the body's design was located by the study team from NASA's Ames Research Center. It's a visco elastc foam that could equally spread the weight of the human body for the foam surface. memory foam mattress reviews Polyurethane foam material is employed because the foam memory. The bed manufacurers can include various kinds compounds to improve the density of the foam. After the chemical is included, the foam could have higher thickness. Besides, the maker will add a viscoelastic foam product. The viscoelastic foam is non-toxic. The foam weight is detemined by howmuch compounds are employed in the foam's manufacturing process. Most memory foam mattress has a fat of 4 - 5lb. Brighter memory foam mattress weight in between 2 - 3 lb. In 1991, an organization based in Sweden, Tempurpedic offered the research mattresss foam towards the people. After that, Tempur Pedic offered the memory mattress foam to the people that reside in Canada and Usa. Tempurpedic's mattress became highly popular. The success of Tempurpedic had caused the makers sell them to the local buyers and to produce their own types of foam mattresses.