Does a firm tight-top mattress need a box spring?

No box spring is required. This Stearns & Foster Estate firm tight top mattress is a 13.5-inch foam-encased hybrid that performs best on a firm, flat base: a platform, an adjustable frame, or closely spaced slats. An old-style coil box spring flexes too much and can shorten the life of the pocket-coil core, so it is not recommended. Any sturdy foundation that fully supports the perimeter keeps the bed stable and protects the 10-year warranty.

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