Uncovered mattresses facilitate the perfect conditions for the breeding of dust mites which can cause allergies, asthma, eczema and rhinitis. These dust mites, which are invisible to the naked eye, live on the millions of skin cells and body fluids that humans expel every night. Protect yourself as well as your mattress by Covering your mattress with Southern Textiles' Platinum Mattress Protector.10 Year limited warranty Top Surface - 78% Polyester 22% Nylon Backing - 100% Polyurethane(TPU) Skirting - 92% Polyester 8% Lycra Repels body fluids and moisture 78% Polyester 22% nylon fibers for extra comfort and absorbancy Waterproof layer for extra barrier from body moisture Allows vapors to easily breathe through protector Luxurious, ultra-soft paddingCountry of Origin: China Finish: White Length: 80 Size: Twin XL Width: 39