Premium Steel Mattress Foundation, feel the comfort! Too much tossing and turning? Stop flipping your mattress and spring into an upgrade! Revolutionary iCoil Mattresses aren"t like ordinary inner-spring sleepers. Each independently wrapped coil is distinct from the next, not all being lashed together as in ordinary mattresses. So they not only retain their shape longer and support far better, but they won"t transfer motion from one sleeper to another. And more coils placed closer together alleviate uncomfortable pressure points! Replaces box spring; Super-stable metal construction; Assembles easily with no tools; Comes with quilted polyester cover; Creates 14" of storage beneath.; State Size. Serene slumber is here! Twin - 39"w., 75"l.; Full - 54"w., 75"l.; Queen - 60"w., 80"l.; King - 76"w., 80"l. Premium Steel Mattress Foundation