Memoryfoam mattress is just a sort of bed that is created from memory. Besides polyurethane, it's also made from other forms of substances. The substances which are put into the mattress foams allows the capacity to increase in thickness to it. Memory foam mattress can be called visco elastic polyurethane foam. The bed originated as a way to meet with the mattress shoppers' demand. The Memory Foam Mattress' annals may be traced back to the Ames Research Center of NASA. The Ames Research Center of NASA borrowed a task to style a bed foam that will help to alleviate backpain of the astronauts caused by gforces within the 1970s. NASA believed the foam product should be used to comply with the shape of your body. The person could eventually move out of the position although making a shape for the body can help solve the problem. About the body, inappropriate pressure points will soon be formed as a result. Later, a method to produce a foam that will evolve the the body's appearance was located by the investigation team from NASA's Ames Research Center. It is a visco elastc foam that will evenly spread the weight of the body towards the foam area. memory foam mattress reviews Polyurethane foam product is employed since the foam memory. The mattress manufacurers may include several kinds of chemicals to improve the thickness of the foam. Following the chemical is included, the foam will have higher density. Besides, a visco elastic foam material will be added by the maker. The visco elastic foam is non-toxic. The foam fat is detemined by howmuch chemicals are used in the manufacturing means of the foam. Many memory foam mattress has a fat of 4 - 5lb. Lighter memoryfoam mattress weight in-between 2 - 3 lb. In 1991, a company based in Sweden, Tempur Pedic bought the people the study mattresss foam in Sweden. Next, Tempur Pedic bought the memory mattress foam towards the people that live-in Usa and Canada. The mattress of Tempurpedic became highly popular. The achievement of Tempur Pedic had caused the suppliers to create their particular variations of memory foam mattresses and sell them to the local consumers.