Whether you’re a stomach sleeper, a back sleeper, or somewhere in between, you’ll be resting in comfort on the Signature Sleep Freedom 6 in. Memory Foam Mattress. This supportive mattress is made of CertiPUR-US® certified foam that helps distribute body weight evenly, relieving pressure on joints while contouring to your body. The unique memory foam also helps eliminate disturbance from your sleeping partner’s movement. This cushy mattress comes with a polyester cover to provide even more comfort that lasts for years to come.