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: These require a firm, non-flexible surface. Use a zero-deflection foundation or a platform with closely spaced slats (3 inches or less) to prevent the foam from sagging into gaps.

Ensure the box spring matches your mattress dimensions exactly. : Twin : 38" x 75" Full : 53" x 75" Queen : 60" x 80" King : 76" x 80" buy box spring only

: Generally perform best on rigid foundations, similar to foam mattresses. 2. Select the Right Profile (Height) : These require a firm, non-flexible surface

: Provides minimal lift. Ideal for platform beds that need just a touch of extra support or airflow. 3. Check Dimensions & Accessibility : These require a firm