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Before buying a mattress, try it
Q: How do memory-foam mattresses differ from inner-spring mattresses? A: Inner-spring mattresses account for more than 90 percent of wholesale mattress sales in the United States, according to the International Sleep Products Association. They contain a network of coils or springs, clad in layers of padding. Foam mattresses have no coils, although there are several types of foam, each with a different density. Memory foam, or viscoelastic polyurethane foam, is a heat-sensitive, man-made material...
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