This waterproof mattress protector is designed to safeguard you against unwanted fluids disturbing your sleep. This bedding accessory has a breathable membrane that keeps your mattress fresh. The waterproof lining totally repels fluids, spills and accidents. The cotton toweling top allows the comfort of your mattress or topper to come through and yet provides a very soft, quiet sleep surface. Fits Twin and Twin XL size mattresses.