Protect against spills, stains, and life's everyday debris with the Helix Waterproof Mattress Encasement. With 360 degree protection that surrounds your entire mattress, you can sleep with complete confidence. This hypoallergenic Mattress Encasement helps you guard against the threat of bed bugs and dust mites. Ensure 360 degree protection with a Waterproof Mattress Encasement that fits snugly around your entire mattress. Our waterproof design guards against everything from spills and accidents to the buildup of dirt and debris on your mattress. 1 Year Manufacturer Limited Warranty.