The topper comes with a zippered removable cover that features a unique fabrication that’s always “cool to the touch”. In addition, it has a mesh gusset to allow for even more air flow while you sleep. A non-skid backing locks the topper in place on your mattress. This gel topper also features a unique hole punch design to provide maximum air flow that along with the cooling gel infused memory foam, provides the ultimate in sleeping comfort. Along with keeping you cooler, this topper helps to alleviate pressure points while the 2.5 lb. density temperature-sensitive foam adjusts to your body temperature. Memory foam is also resistant to dust mites and is naturally antimicrobial. The topper comes in full mattress sizes to give your bed end to end coverage. Twin: 39x75+2” Twin XL: 39x80+2" Queen: 60x80+2"