The Waterproof 2-Pk Pillow Protector consists of a protective breathable cover with a 230-thread count, and 100% polyester shell that’s been treated with Teflon. This treatment applies a base that allows the material to repel oil and water, facilitates easier cleanup, and releases stains during normal cleaning. The superior waterproof barrier extends the life of your pillows by preventing stains, blocking out dirt and sweat, and eliminates bad odours. This protector also includes a heavy gauge nylon zipper for convenient use.