PureCare's Cooling Pillow Protector 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. Our pillow protectors feature MiteTight® seams and a locking zipper, providing a physical barrier against allergens, bed bugs, dust mites, stains, moisture, mold, and mildew. Our clinically proven OmniGuard® Advance lightweight performance fabric is approved for all pillow types and won't alter the feel or comfort of your pillow. Our exclusive AirXchange® filter allows air to pass through the pillow protector while filtering out contaminants to keep it cool and to ensure that pillow comfort is not affected.