The 1.5-Inch Arctic Sleep by Pure Rest Marbleized Gel 5-Zone Topper offers both the benefits of memory foam with the cooling properties of gel in this unique and functional mattress topper. Unlike many "cooling" memory foam products using regular cooling "gel-beads" that can separate and cause a mess, the special marbleized infusion of cooling gel liquid into the memory foam means the cooling properties of the gel foam are spread more evenly and thoroughly throughout the topper to better help regulate the temperature of this topper while you sleep - that means that if you have a tendency to get very hot while sleeping, you can experience a cooler, more inviting sleep thanks to the temperature regulating marbleized gel infusion. The specially designed 5-Zone support patterns are molded right into the memory foam to help reduce pressure points that cause tossing and turning - head, shoulders, back, legs, and feet – giving more support at higher compression levels so you get support precisely where it is needed. In addition, the topper is also ventilated to allow airflow and further help regulate heat build-up during sleep. Memory foam is sensitive to body temperature and changes shapes as you move to provide responsive support all night long for better sleep. This topper can be placed right on top of your existing mattress and never needs turning. Hypoallergenic and easy-care - spot clean only. Does not include a cover. After unpacking, allow 24 hours for the topper to regain its loft. -100% Polyurethane Twin: 37 in x 73 in x 2 in Full: 52 in x 73 in x 2 in Queen: 58 in x 78 in x 2 in King: 56 in x 78 in x 2 in California King: 70 in x 82 in x 2 in Imported Material & Care Polyurethane foam Spot clean only