Memory Foam- What is it?

Memory foam was originally developed by NASA to ease the pressure of extreme G-Force during space shuttle take off. It was never used in the space program, but was subsequently used in medical applications, for example with patients suffering from pressure-sores or who are bed-bound for a long period of time.

Memory foam is often referred to as Visco Elastic Foam It is created using polyurethane and a mixture of other reactive chemicals which form a foam block after the expansion and curing processes. During the manufacturing process the density of the foam block is decided. Higher density memory foam reacts to body heat and weight, which allows it to mould itself to the shape of a warm body within a few minutes. A lower density memory foam is pressure-sensitive and will mold more quickly to the shape of the body. The example often used to demonstrate its properties is that a hand pressed into the foam and then removed will leave a clear impression in the foam.

Memory foam was initially too expensive for general use, but in recent years because of demand, it has become cheaper to produce and is now widely available. Its most common domestic applications are mattresses; pillows and mattress toppers. It remains useful in many medical-related areas, offering comfort and support for many people with posture; orthopaedic and disability difficulties.

Memory foam mattresses are usually more dense than an ordinary foam mattress and are therefore heavier, but because of it's obvious qualities, this is a little price to pay. It is a good compromise between the comfort of a soft mattress and the supportiveness of a firm one. Memory foam mattresses often cost more than traditional foam mattresses, and many conventional sprung mattresses, but the benefits far out weigh this cost difference, and also they generally have a longer life expectancy.

Memory foam often gives off a distinct chemical odour when first purchased, this is a characteristic smell which is apparent with all foam products. This fades over a short period of time.