The Buglock® Plus Mattress Encasement's sleep surface is smooth and waterproof. The Miracle membrane provides an anti-allergen barrier, creating a healthy sleep environment. It is also bedbug entry and escape-proof. Economic encasement. Smooth microfibre sleep surface. Waterproof Miracle Membrane allergen barrier lightweight, stretchy and undetectable. Air vapour porous. BugLock with secure seal bite proof on the sleep surface. Colour coded size labels. The benefits of BugLock Plus: keeps human body fluids out. Prevents growth of bacteria in the mattress. Keeps dead skin cells out. No stains on the sleep surface. Easy care. Wash hot. Tumble dry.100% Polyester