EvenCool™ Fabric. Designed to keep you cool and comfortable all night long. Fire Shield® Fiber. ½" Gentle Support™ Foam. ½" Hi IFD Support™ Foam. ½" Gel Active® Gel Memory Foam. 2" Hi IFD Support™ Foam. 850 IWC System with Coil Encasement. Individually wrapped coils isolate motion and lessen the disturbance of a sleep partner. Steel coils and edges provide superior edge support.