Believe it or not, memory foam came about early on in the 70'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 substance, named visco elastic, was invented 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 equal distribution of body weight over the entire surface of the foam, quickly adapting to any movements of the body. Tempur-Pedic introduced the earliest 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, thus reducing pressure points. On an ordinary 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.

An additional feature of this foam is the open cell make-up, which allows the mattress to breathe. For the most part, the memory foam beds will not retain your body heat and moisture, leaving the sleeping area comfortable all night.

Visco foam is very resistant to mold, mildew, bacteria and other odor causing germs. 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 won't wake and disturb the other. Less disturbance 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 additional support. While you can definitely 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 a flat, concrete surface.

Also, sure to take a close look at the warranties that different companies have and beware of cheap imitations. You cannot always be sure of the quality of memory foam from overseas, so be wary of foam mattresses not manufactured in the United States.

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