Memory foam mattress can be a form of mattress that's created from polyurethane. Besides memory, it is also made from other forms of substances. The compounds which might be added to the bed foams provides the capacity to increase in occurrence to it. Memory foam mattress can be called viscoelastic memory foam. The bed originated as a way to meet with up with the need of the mattress shoppers. The Polyurethane Foam Mattress' history can be traced back to the Ames Research Center of NASA. NASA's Ames Research Center borrowed a project to design a bed foam which will help to alleviate pain of the astronauts due to g-forces back in the 1970s. NASA believed that the foam material must be used to conform to the body's shape. Though creating a shape for your body can help to solve the problem, the individual might ultimately move-out of the career. Consequently, incorrect pressure points will be formed on the body. Later, a way to produce a foam that will adjust the your body's shape was located by the research team from NASA's Ames Research Center. It is a visco foam that may equally distribute the weight of the body towards the foam floor. Synthetic polyurethane foam material can be used because the foam memory. The mattress manufacurers may add various kinds substances to improve the density of the foam. The foam could have higher thickness, after the chemical is included. Besides, a viscoelastic foam product will be added by producer. The visco elastic foam is nontoxic. Howmuch compounds are employed inside the foam's manufacturing process detemins the foam weight. Many memory foam mattress has a weight of 4 - 5lb. Lighter polyurethane foam mattress weight between 2 - 3 lb. The finding caused Fagerdala World Foams of Sweden sell the consumers it and to try out it. In 1991, Tempur Pedic, a business situated in Sweden sold the people the study mattresss foam in Sweden. Next, Tempur Pedic sold the memory mattress foam to the people that live in Canada and Usa. The bed of Tempur Pedic became highly popular. Tempur Pedic's success had caused the producers promote them towards the local consumers and to make their particular types of foam beds.