Does this iComfort memory foam mattress need a box spring?

No. This all-foam mattress needs a flat, solid surface, not a box spring, which is designed for spring beds and would let the foam sag through the gaps. Use a platform bed, a slatted frame with slats under 3 inches apart, an adjustable base, or a solid foundation. Even, continuous support protects the 6" Serta foam core and keeps the 10-year warranty valid.

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