Uncovered mattresses can become a perfect breeding ground for dust mites can cause allergies, asthma, eczema, and rhinitis. These dust mites, are invisible to the naked eye, live on the millions of skin cells and body fluid that humans expel every night. Protect yourself as well as your mattress by covering your mattress with the Platinum Mattress Protector Repels body fluids and moisture 100% natural cotton fibers for extra comfort and absorbency. The Leggett and Platt QD0177 provides a clean and hypoallergenic sleeping environment. It super stretches for added comfort and an easy fit. Easy care, no iron needed. Waterproof layer for extra barrier from body moisture such as urine and sweat. It allows vapors to easily breathe through the mattress protector. It fits up to 18" Mattress.