Hanna Kay Mattress Protector King size Cotton Fitted sheet style fits all mattress depths from 6" to 22" Protects the mattress from all liquid stains, allergens, dust mites and bacteria (10 Year Warranty) Breathable yet repels liquids through a revolutionary waterproof membrane Ultra-thin with a cotton terry surface , will not change the feel of your mattress Ideal for asthma, and allergy sufferers