Soft, knit fabric cover Soft and breathable knit fabric cover. A luxurious 1.5 inch layer of high performance visco-elastic memory foam minimizes pressure on the body and provides balanced support. 4.5 inches of high density poly base foam provides cushioning and optimal support for years of peaceful nights Fire retardant barrier Fire retardant barrier meets federal flammability standard 16 CFR 1633 for your safety and peace of mind while you sleep. Made with CertiPUR-US® certified foam Enjoy a memorable night's sleep thanks to our Signature Sleep memory foam mattresses. The unique memory foam construction is designed to distribute your body weight evenly, relieving pressure on your shoulders, hips and feet while perfectly contouring your body. Plus the isolating qualities of this incredibly comfortable Signature Sleep 6" Memoir Mattress means you won't be woken up by anyone else's movement. This Signature Sleep mattress meets federal flammability standard 16 CFR 1633. Here's to sleeping soundly!