MATTRESS PROTECTION- The mattress cover provides protection from stains while helping to extend the life of your mattress. Made from a super soft Rayon. The cover is plush and breathable. It's a comfortable, cozy addition to your bed linens! EXTRA DEEP POCKETS- The cover has full skirted, extra deep 21" pockets with elastic edges for no slip corners that will fit regular and high-profile extra-long twin mattresses; it's also compatible with pillow top mattresses and foam toppers. EASY CARE- This easy to care for protector is conveniently machine washable and dryer safe. PRODUCT DETAILS- Dimensions: 39"x 80"x 21". Extra Long Twin size.