This 8-inch, dual-layer mattress features a 2-inch layer of gel memory foam that conforms to the body and helps to align the spine. The second layer is made of six inches of high-density foam that gives the mattress it's signature medium-firm feel. The surecool foam infused with gel and designed with pure flow ventilation to keep air flowing and maintain a comfortable sleeping temperature. Textured, breathable fabric cover tops this certipur-us quality certified foam for unbeatable comfort and reliability.