Extra firm top. Quilted gel foam pulls heat away for a cool-to-the-touch surface. Firm support foam offers an extra layer of enhanced pressure relief. Advanced TheraLume Memory Foam delivers 2.6x longer-lasting cooling and pressure relief than regular foams. Five-zoned coil system contours to your body for additional back and thigh support, reducing tossing and turning. Foam encasement surrounds the mattress for an extended, comfortable sleep area.