Sleep Master 13-Inch Pillow Top Pressure Relief Memory Foam Mattress Set with Bi-Fold Boxspring, Full Top pillow layer of 3" memory foam and 1.5" of pressure relief breathable foam The body core is layered with ventilated foam and a base layer of high density foam to provide long lasting durability and stability The foams are infused with Green Tea, Charcoal and Natural Renewable Plant 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