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The most exciting, innovative, and popular mattress available today is the Memory Foam mattress! Memory foam was developed for NASA to provide relief for astronauts undergoing G-forces during space shuttle take offs! It was never used in the space program, but was used in medical applications, for example with patients suffering from pressure sores or bed-bound for a long period. It responds to your body's heat and molds around you, relieving pressure points and improving circulation. It provides a hypo-allergenic sleeping surface that is also mold and mildew resistant. It also instantly responds to touch and temperature. Today most mattress manufacturers offer a line of memory foam mattresses. The reason memory foam reacts to heat so well is because memory foam is made from polyurethane with additional chemicals that add to its viscosity level and thereby increasing its density.
Furniture made from Memory Foam is often referred to as visco-elastic polyurethane foam. Depending on the chemicals used and its overall density, it is firmer in cooler temperatures and softer in warmer environments. Higher density memory foam reacts to your body's heat which allows it to mold itself to the shape of a warm body within a few minutes. Lower density memory foam is pressure-sensitive and will mould more quickly to the shape of the body. The example often used to demonstrate its properties is that if you press your hand into the foam and then remove it, it will leave a clear impression in the foam. Initially memory foam was very expensive for general use, but in recent years it has become cheaper to produce and it is now widely available! It is most commonly used in mattresses, pillows and mattress pads. Memory foam remains useful in medical-related uses too, such as wheelchair seat cushions, hospital bed pillows, and padding for persons suffering long-term pain or postural problems! Memory foam cervical pillows, for example, help to alleviate chronic neck pain. Its heat-retaining properties are also helpful to some pain sufferers who need the added warmth given by the memory foam to alleviate pain. A memory foam mattress is usually denser than your ordinary foam mattress. It is more supportive then your ordinary mattress and also heavier. It is often seen as a good compromise between the comfort of a soft mattress and the supportiveness of a firm one. Memory foam mattresses often sell for more than traditional mattresses but they last a lot longer. Beds are not always only for sleeping so it is important to consider that moving around on hands or knees on a memory-foam mattress is different from more standard mattresses. Knees will sink a lot deeper making bedroom activities difficult at first.