Does this memory foam mattress need a box spring?
No, and a bare sprung box spring is not ideal. This all-foam Cocoon needs firm, continuous support: a platform bed, a slatted base with gaps under 3 inches, an adjustable base, or a solid foundation. An open box spring lets the foam flex through the coil gaps, which can cause uneven wear. Solid, even support keeps the 8-inch foam build sound and protects the 10-year warranty.
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