Our Cooling mattress protector offers lightweight and fully washable protection, guarding the top and sides of your mattress against moisture, allergens, dust mites, mold, mildew, and stains with its 5-sided barrier. Engineered for responsive cooling coverage, it features mineral-based FRíO® rapid chill cooling fibers. These innovative fibers channel body heat through each cooling thread, effectively dispersing heat away from your body throughout the night, ensuring a consistently cool sleep surface.