100% WATERPROOF PILLOW PROTECTOR: Protects against perspiration, drooling, liquid spills, and stains. PROTECTS AGAINST BED BUGS: Zipper enclosing designed with Guardmax Patented Technology to seal your pillow from any bedbugs that may try to penetrate through. HYPOALLEGENIC PILLOW CASE: Guardmax pillow covers are designed to protects against dust mites and other allergens from coming into contact with your skin.