Coop's Ultra-Tech Waterproof Mattress Protector keeps spills, sweat, and accidents from reaching your mattress without the slippery, crinkly feel most waterproof protectors come with. The Lulltra fabric (a polyester and bamboo-derived viscose rayon blend) feels and sounds like a soft sheet, breathable, quiet, and smooth. Backed by a waterproof polyurethane layer that blocks moisture from soaking through, with breathable sides so heat doesn't get trapped underneath. Available in six sizes (Twin, Twin XL, Full, Queen, King, California King). OEKO-TEX Standard 100 certified and machine washable.