How long do foam mattresses last?

A quality all-foam mattress typically lasts 7 to 10 years, depending heavily on foam density. Higher-density foams resist sagging and body impressions far longer than cheap low-density foam, which can soften within a few years. The base layer matters most for longevity. Using a firm, even foundation and rotating the mattress helps spread wear so the foam keeps its shape and support for as long as possible.