Premium Waterproof / Bed Bug Proof Mattress Encasement Made with Ultra Soft Microfiber Fabric . (Pair Of King Size Pillow) microfiber Surrounds and protects the pillow on all sides against allergens, dust mites, bed bugs, bacteria, perspiration and fluids. Machine wash and tumble dry for easy care 2 PC Set Fits pillows up to size 21" X 36" Pest industry approved lifetime warranty