Grande Hotel Collection 5.5 inch Gel Memory Foam and Fiber Mattress Topper, King Size 4 inches of gel memory foam, 1.5 inches of fiber. Revolutionary Memory Foam infused with cool, rejuvenating gel Cradles your body, reducing pressure points that cause tossing and turning. Temperature sensitive foam adjusts to your body temperature Meets all flammability standards. Measures 5.5 inches thick Density: 3.5 pounds. Cover: 1.5 inch fiber cover with a stretch-to-fit 17-inch contour skirt Cover care instructions: Spot clean