Mainstays 5" Memory Foam Youth Mattress: * Moisture barrier treatment protects mattress from spills and wetness * Natural green tea embedded in memory foam * 100 percent polyester terry cover * Heat-sensitive memory foam * Base layer made of breathable HD foam * Twin mattress dimensions: 39" x 75" x 5" * Full mattress dimensions: 54" x 75" x 5" * Also available: Smart Base Steel Bed Frame in Twin/Full and Queen/King * Beds sold separately. See our assortment of beds. * Bed frames sold separately. See our assortment of bed frames.