No Box Spring Needed: Mattress slats are made of sturdy hardwood to support life of mattress and allow for less sagging for both inner-spring and memory foam mattresses. Mattress can be put on the slats directly, you can save money on box springs. The tufted adjustable headboard can be adjusted in a height range of 35 to 39 inches, allows you to use 8-14 inch mattresses.