Polyester All New innovative design and Premium RMS underpad offers comfort & waterproof protection, keeps your sheets dry all night with four layers of protection 4 layers of Ultra protection: Deluxe blended fabric and premium brushed polyester quilted top, soft polyester fiberfill layer, Absorbent inner layer, and Non-slip latex-free waterproof barrier Goes over the bottom sheet to protect mattress and sheets from moisture and staining Absorbs quickly and locks in moisture for the best in skin care Machine wash & dry normal setting, mild bleach may be used. 36" L X 34" W. The washable & Reusable bed underpad is designed for individuals suffering chronical incontinence. Royal Medical Solutions presents RMS Reusable Absorbent Waterproof Sheet Protector which was designed carefully by healthcare professionals. The washable underpad can keep your bed sheets dry all night and protect mattress and sheets from moisture and staining caused by incontinence or medical conditions. Offers 4 layers protection -Deluxe blended fabric and premium brushed polyester quilted top, soft polyester fiberfill layer, Absorbent inner layer, and Non-slip latex-free waterproof barrier. Our Sheet Protector is machine washer and dryer friendly. Size: 36x34 Inch (Pack of 1)