Estate Brighton Luxury Firm Stearns & Foster King Mattress Only PrimaCool Quilt cradles your body and helps promote a cooler sleep experience. The Quilt features naturally breathable silk and wool infused with OUTLAST material for added cooling power which is layered over gel foam for indulgent comfort. Cashmere-infused cover adds and extra feeling of luxury at the surface for an even more exquiste sleep experience. .5"-1.5" of PrimaCool Gel Memory Foam helps to promote a cooler sleeping environment. PrimaVent System solid brass air vents allow for increased air flow. PrimaCore Comfort layer features additional foam in the center third of the bed to support the heaviest part of your body-your torso-to create a uniform feel form head to toe. It helps enhance the durability of the mattress.