TEMPUR-Flat High 9 " FoundationEngineered to support your Tempur Pedic mattress and upholstered in matching grey fabric with a perfectly solid, flat surface at a height that's right for you. This ultra low profile box spring makes it easier to get in and out of bed, navigate tight corners, and works great with platform beds without looking overly bulky like a traditional height box spring would be. Always support your box spring with a bed frame or place directly on the floor.