High-quality zipper: To avoid the zipper getting stick or dislodged when changing the mattress cover, we use the best zipper on this mattress protector. Also, the quality of stitches you can trust which will not popped and ripped. Superior Protection: The Premium Mattress Encasement completely encloses the mattress, acting like a protective layer over the top, bottom, and sides of the mattress. 100% Waterproof Protection: This mattress protector with thick PU backing protect your mattress from liquids spills. Easy Care: Machine wash in cold water with things in similar color; Tumble dry low; Do not bleach. Super Soft Fabric: breathable and absorbent polyester. Waterproof Box Spring Encasement Twin Size 7-Inch