Our Comfort Shield ambient control mattress protector is specially design to maintains your ideal body temperature all night long. The performance fabric wicks away moisture and reduces heat build-up to keep you cool and comfortable. The cover protects your mattress from spills, soiling and dust mites and elongates the life of your mattress. The expandable knit contoured skirt fits mattresses up to 20″ ensuring a snug fit to the deepest of mattresses. Lifetime Warranty on mattress pad against stains and manufacturer defects.