Cool Harmony™ PCM Fabric. Provides instant cooling relief designed to help you get to sleep more quickly. Fire Shield® Fiber. Gentle Support™ Aire. ½" Gentle Support™ Foam. 1" Gel Active® Gel Memory Foam. 2" Gel Active® Gel Foam. 1000 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.