Enjoy a fresher, cooler night's sleep with the Sealy Flex Bamboo Fitted Mattress Protector.This mattress protector features a luxurious flex knit fabric made with Rayon from bamboo which wicks away moisture to help keep you dry and comfortable. 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.