The Brentwood Rest Easy Instant Folding Box Foundation requires absolutely NO ASSEMBLY. Why waste hours of your time and effort assembling other foundations when you can use the Rest Easy foundation almost instantly? Simply remove the foundation from the box, unfold and sleep - it's as easy as 1-2-3. It ships in an easy-to-carry box that can fit through small doorways and stairwells. The Rest Easy foundation is made from heavy-duty powder-coated steel for maximum durability and firmness. This foundation works with any type of mattress and will replace your old box springs or box foundations. The foundation will fit in your bed frame and provide a flat supportive surface for your mattress. Comes finished in a beautiful soft knit cover. It is available in Twin, Twin XL, Full, Queen, King and California King sizes. The King and California King sizes come in two pieces. The Brentwood Rest Easy Box Foundation is approximately 8" Inch in height.