Keeps sheets dry all night. Unique brushed polyester fabric channels fluid away from the surface for maximum comfort and ultra-dry surface. Absorbs quickly and locks in moisture for the best in skin care. Goes over the bottom sheet to protect mattress AND sheets from moisture and staining. No more middle-of-the-night bed stripping, simply replace the Priva sheet protector with a fresh one in seconds! Non-slip backing. Waterproof. 34" x 52"