Product: Echo Mattress The heat sensitive foam softens as it absorbs body heat and allows the mattress to gradually conform to the shape of your body and to distribute your weight evenly across the surface. All parts of the body are properly supported allowing correct alignment of the spine. The spring unit and the visco-elastic foam work in unison so that the mattress compensates for unequal pressures and provides uniform support along the entire length of the body. By delivering optimum back support, Memory Master mattresses help prevent uncomfortable pressure points that cause tossing and turning, resulting in restful, healthy sleep.