Our most premium model combines the enhanced support of our encased coil system with the high-density DuraFlex™ Coil Edge system for increased durability. This mattress includes multiple layers of our SealyComfort™ and SealySupport™ Gel Foams to maximize comfort and support, plus an added layer of memory foam in the CoreSupport™ center to provide additional pressure-relieving support for the heaviest part of your body.