Upgrade your mattress support without the hassle of buying a box spring or replacing your bed frame. Made for frames with horizontal center support, this vertical-slat bunkie board is sturdy, durable, and built to last. Simply place the Compack® Fabric Covered Wood Slats on the inner edges of your bed frame for reliable support with any mattress. Wrapped in a clean fabric cover, it is as aesthetically pleasing as it is functional. It arrives compact, requires no assembly, and is easy to store; simply unroll and your mattress is ready for stable, comfortable sleep.