CottonProtects Against Dust Mites, Fluids, Urine, Perspiration, Allergens And Bacteria (10-Year Warranty)Hypoallergenic Cotton Terry Surface With Membrane Back Coating (Waterproof, Noiseless and Breathable)Great For Those With Kids, Pets, Allergies, Asthma, Eczema Or Incontinence (OEKO-TEX Certified SH025 151792)Will Not Change The Feel of Your Mattress (Registered with the FDA as a Class 1 Medical Device)Fitted Sheet Style Design - Twin Size Mattress Protector 39" x 75" - Fits up to 14" deep