Sleep Secure Terrycloth Waterproof Twin Bed Bug Mattress Cover Cotton-blend Mattress Cover- Protects Against Bed Bugs, Dust Mites, Allergens and Bacteria Waterproof Hypoallergenic Cotton Terry Surface prevents growth of Bacteria Great For Those With Kids, Pets, Allergies, Asthma, Eczema Or Incontinence Fitted Sheet Style Design for a Twin Size Mattress 80% Cotton, 20% Polyester Terry