The Beautyrest World Class Level 3 hybrid mattress delivers 13.25” of luxury comfort, durability, cooling, and advanced support. Designed for back and stomach sleepers, its firm comfort level offers a solid feel with minimal give, while layers of World Class Relief HD foam and ActiveRespsonse Max memory foam provide outstanding comfort and pressure relief that adapt to your body. With the InfiniCool cover, you can sleep comfortably with a cooling sleep surface. The 1000 Series Pocketed Coil support system offers advanced, individualized support and motion separation. Mattress protector recommended. Made in America. Compatible adjustable bases.