High Quality Content by WIKIPEDIA articles! Memory foam is polyurethane with additional chemicals increasing its viscosity and density. It is often referred to as visco-elastic polyurethane foam. In some formulations, it is firmer when cooler. Higher density memory foam reacts to body heat, allowing it to mold to a warm human body in a few minutes. A lower density memory foam is pressure-sensitive and moulds quickly to the shape of the body.

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