Does the MLILY WellFlex 3.0 plush mattress need a box spring?

No traditional box spring is required. This all-foam bed needs a solid, flat, supportive surface: a platform bed, slatted base with narrow gaps, or a bunkie board. It is also adjustable-base compatible. Skip an old sagging spring foundation, which can leave the soft comfort layers unsupported and may void the warranty.

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