Memory foam came about in the early 1970's when NASA started a development project designed to create a material that could help ease the discomfort astronauts felt during lift-off. During the course of research, a new foam material, called visco elastic, was created that was able to conform to a person's shape and then return to its own natural state when weight was removed. This foam allowed for the even distribution of body weight over the whole surface of the foam, swiftly adapting to any movements of the body. Tempur-Pedic introduced the original memory foam beds in 1992, to great success.

A visco memory foam mattress is not what you would call a "soft" mattress. It molds and contours to the body, and the contouring effect spreads that weight over more of the sleeping surface, thereby eliminating pressure points. On an average inner-spring mattress, pressure points can create discomfort and cause you to toss and turn, so memory foam's contouring nature will allow for a better night's sleep.

Another feature of this foam is the open cell composition, which allows the bed to breathe. In effect, the memory foam beds will not retain your body heat and moisture, leaving the sleeping area comfortable all night.

Visco foam is highly resistant to odor causing germs, mold and bacteria. Because many people suffer from allergies, visco can help to improve your overall health and comfort by reducing the presence of these allergens in the bedroom.

A memory foam bed also works to lessen motion transfer between you and your partner, so if one of you moves during the night, it will not rouse and disturb the other. Fewer disturbances due to movement means a deeper, more restful sleep.

It's important to note that good memory foam beds won't need a box-spring under them for added support. Though you can certainly use a platform base to raise the height of the bed, it has worth noting that the bed should feel just as good resting on an even, concrete surface.

Additionally, sure to take a good look at the warranties that different companies have and beware of low-cost imitations. You cannot always be sure of the quality of memory foam from overseas, so be wary of foam mattresses not produced in the US.

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