Do I need a box spring with this mattress?

No box spring is needed. This mattress's 815-coil pocketed core supports itself and only requires a flat, rigid foundation: a platform bed, slats spaced under 3 inches apart, or a non-flex box foundation. A springy traditional box spring is unnecessary. Even, solid support across the whole base keeps the medium feel consistent and protects the 10-year warranty.

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