GlacierTouchCool To The Touch Fabric with Tencel assists in temperature management for a cooler nights sleep. Eco-Fiber is yarn that uses recycled water bottles for sustainability. 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.