How long should a mattress last?

How long your mattress lasts can depend on the manufacturer. Naturally, the more expensive mattresses usually last longer, but not always. You'll read that 10 years is a good ball-park figure for the life of a mattress. However, some mattresses now come with lifetime warranties (25 years). You should care for your mattress and rotate it every so often so that you prolong the life of it.