GlacierTouchCool To The Touch Fabric with Tencel assists in temperature management for a cooler nights sleep. 5Z TheraCool QuadTech Gel is infused with copper, silver, and graphite to help your mattress stay cooler, cleaner, drier, and healthier from the inside out. TheraWrap 5-Zone Support System offers five zones of individually wrapped coils for advanced, targeted pressure relief and support. TheraFoam encasement provides tremendous edge support for a smoother transition in and out of bed. TheraFoam encasement provides tremendous edge support for a smoother transition in and out of bed.