Whether you’re hoping to protect your child’s mattress from accidents and spills or you’re guarding against everyday dirt and crumbs, the Helix Kids Waterproof Mattress Encasement has you covered. Our 360° Mattress Encasement helps you guard against the threat of bed bugs and dust mites. Our waterproof design guards against everything from spills and accidents to the buildup of dirt and debris on your mattress. With a 10 inch height, the Waterproof Mattress Encasement is the perfect fit for any mattress under 10 inches in height, giving you and your child complete peace of mind. 1 Year Manufacturer Limited Warranty.