Soft, Breathable Jersey Fabric: Protecting the top of your mattress from spills, stains and allergens does not have to be uncomfortable. This fitted sheet style mattress protector is made of lightweight jersey fabric for a soft, breathable sleep surface that does not alter the feel of your mattress. Quiet Waterproof Barrier: Beneath soft, cozy fabric is a 100 percent waterproof barrier that blocks out fluids, dust mites and allergens with quiet confidence. Liquid-proof membrane helps protect mattresses from stains, which could void the mattress warranty. Vinyl-free protector is safe for children and pets. Protector has knit skirt and deep pocket design that accommodates mattresses up to 18 in. D It is easy to apply and remove for laundering. While on the mattress, the protector has a smooth, secure fit. Great for Kids and Pets: Vinyl-free protector is safe for children and pets. It easy-care fabric make it a great way to protect mattresses and pet beds from accidents. Protector is machine washable and dryer safe.