The ideal solution for night-time accidents & expectant mothers We listened to our customers who were frustrated with waterproof protectors that pool or leak wetness with unpleasant results. We're pretty proud of the result. A soft cotton top layer is treated with 3M Scotchgard Protector Moisture Management, which draws moisture from the surface in a flash. The liquid is transferred to an inner core of cotton wadding which locks the moisture away until you're ready to wash it. A fully waterproof bottom layer keeps your mattress completely dry. This protector is ideal for bed wetting, & also great as a temporary solution for expectant & new mothers.