The Advanced Pocketed Coil™ spring system features three wires woven together to provide enhanced strength and durability. This unique coil system is designed to pamper by conforming to the unique shape of your body and provide the ultimate in a peaceful nights sleep through virtually zero partner disturbance. True foam encasement offers edge to edge sleeping comfort. Only the highest quality and most luxurious of materials come together to create the ultimate sleeping system, the Beautyrest Black™ mattress. Modal Yarns with spun Cashmere are soft and silky to the touch.