Set of 2 Waterproof, Allergen, and Bed Bug Proof / Blocking Pillow Protector with Zipper (Standard - 20" X 26") FABRIC : 100% Polypropylene , BACKING : Polyethylene Block bed bugs and dust mites, Water Proof, Breathable, Zipper Great for homes with Kids, Pets, Allergies, Asthma, and Eczema Standard Size : 20" x 26" ( 51 x 66 cm ) Pack of 2 Pillow Protector Easy to Wash and Use: Machine washable