Cushioned cover of yarn dye jacquard with superfine velveteen borders help to keep your sheets in place. * Sleep cool layering system-2.5" MyGel® memory foam, 3" of Pressure Relief Foam. * Base support layer of 4.5" high density foam to provide long lasting durability and stability. * Bi-Fold® Box Spring Folding Foundation is made from heavy gauge metal featuring maximum edge firmness. * No assembly required- remove from box, unfold, and lay your mattress on top.