Stretch-Knit Cover with MoistureProtect and Surface-Guard Technology wicks away moisture and features antibacterial technology to help keep your mattress protected. IsoMotion Advanced Gel Memory Foam reinforces the center-third of the mattress to reduce motion transfer and provide additional support for the heaviest part of your body. ComfortSense Premium Memory Foam conforms to the body and disperses weight evenly for added pressure relief. The Response Pro HD Encased Coil System provides full-body support while the DuraFlex Coil Edge delivers lasting support to edge-to-edge seating and sleeping surface.