Memory foam mattress is just a sort of bed that's produced from polyurethane. Besides polyurethane, it is also made from other types of chemicals. The substances which can be added to the mattress foams gives the capability to increase in density to it. Memory foam mattress can be called viscoelastic memory foam. The mattress was developed as a way to meet with the bed shoppers' need. The history of the Foam Mattress could be traced back again to NASA's Ames Research Center. NASA's Ames Research Center borrowed a task to create a mattress foam that can help to alleviate backpain of the astronauts due to g forces inside the 1970s. NASA believed that the foam product ought to be used to comply with your body's form. Though developing a shape for that body can help fix the issue, anyone would ultimately move-out of the career. Because of this, improper stress points will be established about the body. Later, ways to create a foam that can conform the your body's condition was discovered by the investigation group from NASA's Ames Research Center. It is a visco elastc foam that may equally distribute the weight of the human body towards the foam floor. www.amerisleep.ca/as2.html The development caused Fagerdala World Foams of Sweden offer the buyers it and to try out it. In 1991, Tempurpedic, a business situated in Sweden sold the investigation mattresss foam to the people in Sweden. Next, Tempur Pedic sold the memory mattress foam to the people that live in Usa and Canada. The mattress of Tempurpedic became highly popular. Tempur Pedic's achievement had caused the manufacturers promote them towards the local customers and to make their particular versions of memory foam beds. Synthetic polyurethane foam material is employed while the foam memory. The mattress manufacurers will add several types of compounds to change the thickness of the foam. Following the compound is included, the foam will have higher density. Besides, a viscoelastic foam material will be added by the manufacturer. The viscoelastic foam is non toxic. How much compounds are used in the production means of the foam detemins the foam fat. Brighter memory foam bed weight between 2 - 3 pound.