EvenCool™ Fabric. Fire Shield® Fiber. Gentle Support™ Aire. ½" Gentle Support™ Foam. ½" Gel Active® Gel Foam. 1" Gentle Support™ Foam. 805 IWC System with Foam Encasement. Foam encasing supports the perimeter of the mattress and increases the life of the mattress since the edges receive the most compression and show wear first. Individually wrapped coils isolate motion and lessen the disturbance of a sleep partner.