Natural Comfort Waterproof Mattress Protector-Cotton Terry Top-15-Inch-17-Inch Deep Pocket, King top is 100% terry cotton Provides complete protection against liquids, fluids and stains Prevent molds, dust mites, mildew, bacteria and odors Is a breathable, permanent 100%moisture-resistant barrier Elasticized polyester skirt to fit up to 17" depth of mattress Hypoallergenic, washable and spot cleanable