The 18" Cooling Cotton Waterproof Mattress Protector is a waterproof mattress protector designed for taller mattresses up to approximately 18 inches high. It protects against spills and moisture while adding a cotton sleep surface with cooling-oriented comfort. Materials and construction Waterproof mattress protector construction. Cotton sleep surface with cooling-oriented comfort properties as listed on the live product page. Deep-pocket fitted format designed for taller mattresses. Protective layer sits beneath the fitted sheet. Certifications and origin Material and certification details should be confirmed on the live product page and product label. Vendor or maker is listed as NB IF in Shopify product data. Fit and dimensions Designed for mattresses up to approximately 18 inches high. Choose the protector size that matches the mattress size. Useful for pillow-top mattresses, hybrid mattresses, and mattresses used with toppers. Care instructions Follow the product care label. Wash after spills or as part of regular bedding care. Dry fully before placing back on the mattress. Avoid high heat or harsh laundry products if prohibited by the care label. Best uses Waterproof protection for taller mattresses. Hot sleepers who want a cooling-oriented cotton surface. Protecting hybrid, foam, and latex mattresses. Pairing with Sparrow, Owl, Finch, Starling, and other higher-profile mattresses.