When you're shopping for dorm bedding, you're probably focused on soft sheets, cozy comforters, and making your Twin XL bed feel as comfortable as possible. But there's one dorm essential that works behind the scenes to help protect all those bedding investments: the Anti-Bed Bug Waterproof Encasement - Twin XL Dorm Bedding. Designed to fully surround your extra long Twin mattress, this protective dorm mattress encasement creates a barrier that helps prevent bed bugs from invading your mattress. While nobody wants to think about bed bugs during college move-in season, a little extra protection can go a long way toward helping you feel more comfortable and confident in your dorm room setup.