Protect-A-Bed Premium Waterproof Pillow Protector, Queen Pillow Size (21x31 in.) Cotton Waterproof: Polyurethane film backing repels liquids like urine and sweat. Breathable Barrier Fabric: NOT hot to sleep on. Allows body vapor to breathe through pad. Dust Mite and Allergy Barrier: Miracle membrane backing provides a healthy sleep zone for your family. Easy to Wash and Use: Machine washable in warm or hot water. Tumble dry on medium heat. Good Housekeeping Seal of Approval