Enjoy a fresher, cleaner night's sleep with the Sealy Flex Charcoal-infused Fitted Mattress Protector.This mattress protector features a luxurious flex knit fabric infused with copper which wicks away moisture to help keep you cool and dry. PerfectGrip Sidewalls ensure a no-slip hold on mattresses up to 18 inches tall. Our SilentGard Waterproof protection stays soft and quiet while protecting your mattress from spills and stains. Machine washable for easy care and backed by the Sealy Certified Lifetime Warranty.