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ALL ABOUT MATTRESSES
Foundation Although in the past the foundation actually contained springs, increasingly today it functions primarily to elevate the mattress, although a good box spring can help prolong the life and comfort of the mattress. There are three main types of foundations: Traditional wood foundation It is usually made of pine or similar hard wood. It usually has seven or eight support slats, covered with cardboard or beaverboard. This type of foundation, called by the industry a zero deflection unit, increases the feeling of firmness or stability. Box spring It features extra-heavy-duty springs. If the springs match the mattress it is called a coil upon coil box spring. Since a box spring has coils, it generally increases the give in the mattress, which in turn produces a softer or bouncier feel. Grid foundation It is a combination of steel and wood. |
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