Linenspa Waterproof Bed Bug Proof Box Spring Encasement Protector - Blocks Out Liquids, Bed Bugs, Dust Mites and Allergens - Full XL Completely surrounds box spring to block out liquids, bed bugs, dust mites and allergens Fabric surface with 100% waterproof layer Zipper closure for complete encasement Machine washable and dryer safe Full XL size includes 54" by 80" encasement; 10-year U.S. warranty; 9" depth 100% waterproof Liquid-proof barrier blocks bugs, dust and pet dander while allowing air to pass Lightweight yet durable fabric Vinyl-free and quiet materials Machine washable and dryer safe Reliable Linenspa quality