1. Keyboard protective film is made of imported transparent and elastic silicone rubber without poison, irritating flavor and harm, complies with the EC environment protection standard and ROHS requirement. 2. It can be used in the rigorous environment for its function of waterproof, dust-resistant, oil-resistant, anti-static, anti-acid and anti-alkaline, and can be disinfected and washed in water without wrinkle. 3. The film can adhere with the keyboard very closely so that fluid can not infiltrate into. It also can be swirled freely and repeatedly and carried portably. 4. The product can be tapped any times without sound due to its good elastics, softness and extensiveness. 5. It is transparent and can make the words and patterns on the keyboard last forever. 6. The film can keep its reliability at operating temperature of -50 to 200 celius degree...7. It is general for any size laptop cut according to the size of the keyboard