Bed Bug Blocker All-In-One non-woven zip mattress encasement cover provides one of the most Powerful Protection against Allergens. We have an exclusive Seal Technology that blocks bed bugs, dust mites and feathers from escaping through film. Our total encasement system features triple seal closure, seam binding and interior barrier flap, and stretch sidewalls to fit most mattresses and box springs, up to 15 inches. This mattress protector is water resistant, made out of soft, quiet, breathable material, perfect for all-purpose protection, particularly for those with Asthma and other Respiratory conditions.