Believe it or not, memory foam came about early on in the 70's when NASA started an experimental project intended to create a substance that could help alleviate 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 subsequently revert to its own natural state when pressure was removed. This foam allowed for the uniform distribution of body weight over the entire surface of the foam, quickly adapting to any movements of the body. Tempur-Pedic introduced the original memory foam beds in 1992, amidst much fanfare.

A visco memory foam mattress isn't what you would call a "soft" mattress. It molds and contours to your body, and the contouring effect spreads that weight over more of the sleeping surface, thus reducing pressure points. On an ordinary inner-spring bed, pressure points can create pain and cause you to toss and turn, so visco'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. In effect, a memory foam bed won't retain your body heat and moisture, leaving the sleeping surface comfortable all night.

Visco foam is very resistant to mold, mildew, bacteria and other odor causing germs. Because countless people suffer with 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 reduce motion transfer between you and your significant other, 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 peaceful sleep.

It's important to know that good memory foam beds will not need a box-spring under them for extra support. While you can definitely use a platform base to increase the height of the mattress, it has important to note 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 be wary of poor quality imitations. You cannot 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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