Memory foam mattress can be a sort of bed that is created from polyurethane. Besides polyurethane, it is also made from other styles of chemicals. The chemicals which are put into the bed foams offers it the capacity to increase in density. Memory foam mattress is also called viscoelastic polyurethane foam. The bed originated as a way to meet the bed shoppers' desire. The annals of the Foam Mattress can be traced back to NASA's Ames Research Center. NASA's Ames Research Center financed a project to create a mattress foam that can help to relieve pain of the astronauts due to g-forces back inside the 1970s. NASA considered that the foam material should be used to conform to the shape of the human body. Although making a shape for the body will help fix the problem, the person might ultimately move-out of the career. As a result, inappropriate pressure points is going to be created on the body. Later, ways to create a foam that can conform the your body's design was identified by the study team from the Ames Research Center of NASA. It is a elastc foam that could equally spread the human body's weight towards the foam floor. memory foam mattress reviews The finding caused Fagerdala World Foams of Sweden promote it to the people and to try out it. In 1991, a company situated in Sweden, Tempur Pedic bought the research mattresss foam to the people in Sweden. Next, Tempur Pedic offered the memory mattress foam to the people that reside in United States and Canada. Tempur Pedic's mattress became highly popular. The achievement of Tempur Pedic had caused the suppliers sell them towards the local customers and to make their particular variations of polyurethane foam mattresses. Polyurethane foam material is used while the foam memory. The bed manufacurers can incorporate several types of substances to alter the density of the foam. Following the chemical is added, the foam will have greater density. Besides, the manufacturer may add a viscoelastic foam material. The viscoelastic foam is non-toxic. The foam weight is detemined by simply how much substances are used in the foam's production process. Brighter memory foam mattress weight between 2 - 3 pound.