Protect-A-Bed Waterproof Cotton Terry Fitted Mattress Protector - Double Protect-A-Bed's cotton terry mattress protectors ensure a healthier sleep zone for your and your family. Protecting your mattress from perspiration and the everday spills that can cause stains and yellowing. Protecting you from dust mite, mould and bacteria allergens, common causes of Asthma and Rhinitis. Waterproof, yet breathable, absorbent, soft and comfortable.