PureCare FRíO combines our specially designed OmniGuard® Advance fabric with rapid chill cooling fibers - a micarex-based responsive textile with unique cooling properties. FRíO's rapid chill cooling fibers disperse body heat throughout the surface of the protector at a rate five times faster than that of regular polyester, focusing solely on heat reduction along the sleep surface through a combination of nano-technology, nylon and mica minerals. The unique tunneling effect of the mineral based fiber keeps heat from accumulating in the material surrounding the body, providing a refreshingly cooler sleep surface. FRíO's rapid chill cooling fibers are a crushed mineral infused textile, meaning the cooling effects of this material are literally built in to the fabric and will not wash out, lasting the lifetime of the protector.PureCare's clinically proven 5-Sided mattress covers fit like a fitted sheet around your mattress. Our covers utilize MiteTight® seams, combined with our OmniGuard Advance lightweight performance fabric to ensure that our mattress protectors sleep quiet and cool, while providing premium mattress protection for your mattress. Great for allergy sufferers, our protectors provide a physical barrier against allergens, dust mites, stains, moisture, mold and mildew. Our PureCare 5-Sided protector works with any mattress type; including memory foam, innerspring, gel or latex mattresses. Completely washable, our 5-Sided protectors are specially designed so that you can wash and dry on hot settings for optimal comfort. Mattress covers conform to strict class one medically recommended allergen standards. 10 year warranty against manufacturer defects.