Memory foam mattress is just a form of bed that is produced from memory. Besides memory, it is also produced from other types of substances. The substances which can be added to the bed foams presents the ability to increase in occurrence to it. Memory foam mattress is also called viscoelastic memory foam. The mattress was created to be able to meet the bed shoppers' requirement. The Foam Mattress' real history may be traced back again to NASA's Ames Research Center. NASA's Ames Research Center funded a project to create a mattress foam that can help to relieve backpain of the astronauts due to g forces in the 1970s. NASA believed that the foam product should be used to conform to the body's shape. The person could ultimately move out of the position although developing a mold for that body will help resolve the situation. Because of this, improper pressure points is going to be established around the body. Later, ways to develop a foam that could conform the your body's shape was found by the study staff from NASA's Ames Research Center. It is a visco elastc foam that will equally distribute the weight of the body for the foam surface. http://www.thebest-mattress.com In 1991, a company located in Sweden, Tempurpedic bought the investigation mattresss foam for the people in Sweden. After that, Tempurpedic sold the memory mattress foam towards the people that are now living in United States and Canada. The bed of Tempurpedic became extremely popular. Tempur Pedic's achievement had caused the companies to make their own types of foam mattresses and offer them towards the local consumers. Polyurethane foam product is employed as the foam memory. The mattress manufacurers can add several types of substances to change the thickness of the foam. The foam can have greater density after the compound is included. Besides, the maker will add a visco elastic foam material. The visco elastic foam is non-toxic. How much compounds are used in the production means of the foam detemins the foam fat. Brighter memoryfoam mattress fat inbetween 2 - 3 lb.