Memoryfoam mattress can be a type of bed that is produced from memory. Besides polyurethane, it's also made from other types of substances. The chemicals which can be included with the mattress foams allows the capability to increase in occurrence to it. Memory foam mattress is also called visco elastic polyurethane foam. The mattress originated as a way to meet with the need of the bed buyers. The real history of the Foam Mattress could be traced back again to the Ames Research Center of NASA. NASA's Ames Research Center borrowed a project to style a bed foam that can help to alleviate backpain of the astronauts caused by gforces within the 1970s. NASA thought that the foam material ought to be used to adapt to the shape of the human body. Although developing a shape for that body can help to solve the problem, the individual would ultimately transfer of the positioning. As a result, improper pressure points will soon be created on the body. Later, a way to produce a foam that will conform the the body's condition was discovered by the investigation team from the Ames Research Center of NASA. It is a visco foam that will equally spread the weight of the human body towards the foam floor. www.amerisleep.ca/as2.html Polyurethane foam material is employed as the foam memory. The mattress manufacurers can incorporate various kinds substances to alter the density of the foam. The foam will have greater density following the chemical is included. Besides, producer may put in a visco elastic foam product. The viscoelastic foam is non toxic. How much compounds are employed in the foam's production process detemins the foam fat. Brighter memoryfoam mattress weight in-between 2 - 3 pound. In 1991, a business located in Sweden, Tempurpedic bought the study mattresss foam towards the people in Sweden. After that, Tempurpedic offered the memory mattress foam towards the people that are now living in Canada and United States. The bed of Tempur Pedic became extremely popular. Tempur Pedic's achievement had caused the suppliers promote them to the local consumers and to create their own versions of foam mattresses.