Our AS4 mattress can be paired with almost any solid or slatted base. You can use a wooden mattress foundation, a panel bed frame, a platform bed, and an adjustable bed base. If you use a slatted surface, make certain the slats are at least 0.75 inches thick and no more than 3 inches apart. Do not place the AS4 or any of our mattresses directly on top of a box spring. A box spring cannot provide a consistently even surface and will leave gaps that allow a mattress to sag prematurely.