Memory foam mattress is made of a material known as memory foam. The memory foam mattress is denser than the other ordinary mattresses. The memory foam mattress is heavier and is also more supportive for the people lying on the mattress than the other mattresses. This kind of mattress is preferred by people these days since it combines both the comfort and the support of the soft and the firm mattresses together. The memory foam mattresses are expensive but they are durable. Memory foam mattresses have a rating between IFD 10 and IFD 120 which is used to determine the quality of softness or hardness in a mattress. According to this rating the memory foam mattresses lie in between hard and soft foam.

Memory Foam, originally the invention of NASA is constructed from polyurethane along with some other chemicals which increased the viscosity level of memory foam by lending it more density that the other foams. Memory foam is also referred to as the visco-elastic foam. The foam is capable of reacting to the body temperature. It moulds itself according to the shape and temperature of the body when in use. The material reacts quickly in high temperature.

Memory foam mattresses have found their uses among patients who are bed ridden since it helps control the gangrene or pressure sores that are caused when someone lies on bed for a considerably long period of time. Memory foam mattresses are used in the households today and are easily available in the stores.