The Memory Foam Mattress' annals can be traced back again to NASA's Ames Research Center. The Ames Research Center of NASA financed a project to create a bed foam that will help to ease pain of the astronauts caused by g-forces back in the 1970s. NASA considered the foam material should be used to conform to your body's design. Anyone would eventually move-out of the position though making a form for that body can help resolve the situation. On the body, improper pressure points will be established because of this. Later, a method to develop a foam that could evolve the the body's condition was found by the study staff from the Ames Research Center of NASA. It is a visco foam that could equally spread the weight of the human body for the foam floor.sleepjunkie In 1991, a company situated in Sweden, Tempur Pedic offered the study mattresss foam for the people in Sweden. After that, Tempurpedic offered the memory mattress foam to the people that live in Usa and Canada. Tempur Pedic's mattress became popular. The success of Tempurpedic had caused the makers offer them for the local buyers and to make their particular variations of memory foam mattresses.Polyurethane foam material can be used since the foam memory. The bed manufacurers will incorporate several types of chemicals to alter the thickness of the foam. After the chemical is included, the foam could have higher density. Besides, the maker will put in a viscoelastic foam material. The viscoelastic foam is nontoxic. The foam fat is detemined by just how much compounds are used within the foam's manufacturing process. Many memory foam mattress features a fat of 4 - 5lb. Brighter memoryfoam mattress weight in between 2 - 3 lb.