Hyper Touch Comfort: Serta replaced ordinary foam with a combination of specialized foam, engineered fibers and premium stretch fabric for total body cradling and better pressure point relief. Cool Twist Gel Foam: The cooling gel is swirled directly into a breathable foam designed to promote airflow and heat dissipation. 805 Edition Custom support Coil System: In addition to providing contouring, cradling support and minimizing the impact of your partner's erratic sleep jerks, this system of 805 individually wrapped coils features Serta's BESTEDGE Foam Encasement Technology - an extra-deep foam rail to help reduce edge roll-off extend the sleep surface. 1/2" Pillow Soft Foam 1/2" Serta Support Foam.