Memoryfoam mattress can be a sort of mattress that's produced from memory. Besides polyurethane, it's also produced from other types of substances. The compounds which are put into the mattress foams offers the capacity to increase in thickness to it. Memory foam mattress can also be called viscoelastic polyurethane foam. The bed was created in order to meet with the demand of the mattress buyers. The real history of the Memory Foam Mattress may be traced back again to the Ames Research Center of NASA. NASA's Ames Research Center funded a task to design a mattress foam that can help to ease back pain of the astronauts caused by g-forces in the 1970s. NASA believed that the foam material should be applied to conform to the human body's shape. The individual would ultimately transfer of the career though creating a mold for your body will help solve the problem. Consequently, wrong pressure points will soon be produced around the body. Later, a method to create a foam that will evolve the your body's design was discovered by the study team from the Ames Research Center of NASA. It is a visco elastc foam that could evenly spread the weight of your body to the foam surface. http://www.memoryfoammattress-guide.org/labor-day-sales-memory-foam-mattresses/ Synthetic polyurethane foam material can be used since the foam memory. The mattress manufacurers may add several kinds of substances to change the density of the foam. The foam could have higher density, following the compound is included. Besides, a visco elastic foam material will be added by the maker. The viscoelastic foam is nontoxic. The foam fat is detemined by howmuch chemicals are employed in the manufacturing means of the foam. Many memory foam mattress has a weight of 4 - 5lb. Lighter foam mattress weight in-between 2 - 3 pound. The finding induced Fagerdala World Foams of Sweden to try out it and offer the consumers it. In 1991, Tempurpedic, an organization based in Sweden sold the people the investigation mattresss foam in Sweden. After that, Tempurpedic bought the memory mattress foam to the people that live in Canada and Usa. Tempurpedic's bed became popular. The achievement of Tempurpedic had caused the manufacturers offer them to the local people and to make their particular versions of foam beds.