Does this memory foam mattress need a box spring, or can it go on an adjustable base?

No box spring is needed. As a 10-inch all-foam mattress it needs a flat, supportive base: a platform bed, solid foundation, closely-spaced slats, or a bunkie board. It is also rated compatible with an adjustable base and will flex at the head and foot without harming the foam. Avoid wide-gap slats, because unsupported foam can sag over time, and sag from a poor base is not covered by the warranty.

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