This line of cotton mattress protector offers unsurpassed comfort and proctection, Protects mattress from wearing and soiling, Waterproof, Anti-dust mite, Material: 100% Cotton terry, Fit: Contour side walls fit 14-17"" deep mattresses, Care: Machine wash, hang dry, Size: Twin (extra long), Dimensions: 39"" x 80"", SKU: DDWN471