This cover does more than just protect your mattress. This mattress protector aids in improving your night's sleep with channel-weave construction that facilitates airflow; transporting heat and moisture away from your body creating a more comfortable sleep. Not to mention, the high tech advanced performance material, the wicking water proof cover (which is non-allergenic and odorless) protects your mattress from stains and liquids.Stretchwall skirt fits up to a 22" mattress.