eLuxurySupply Pillow Encasement - Waterproof and Bug Proof- 10 Year Warranty, King 100% Polyester / 1 mil Polyurethane coating 100-Percent Waterproof And Anti-Allergen Laboratory tested to prevent bacteria, virus, mildew, mold, dust mites and bed bug penetration Lightweight for easy storage and cost efficient washing/drying 10-year Limited Manufacturers Warranty