Memory Foam - modified polyurethane foam low elasticity. Memory Foam Material has a porous structure - it consists of a plurality of cells. The open form of the cells allows them to contract and under the influence of heat and the weight of the human cell is compressed, and the material assumes an anatomical shape of the body. When this action ceases, the material retains the shape of the body more circuits 3-4 seconds, and returned to the opposite state after 10 seconds. It was invented with the support of the NASA space program. The material used in space flight. It was designed to reduce the load on the astronauts. Today, the material widely used in the domestic sphere, including those of his made orthopedic insoles for shoes.