1. Made of non-toxic engineering grade thermoplastic, wear-resistant, soft and durable. 2. The thickness of 0.1mm, light and thin, fits the keyboard accurately and closely, and has no effect on typing. 3. Effectively protect your keyboard, waterproof, dustproof, and dirt-proof. 4. Electrostatic adsorption does not damage the keyboard. 5. The protective film can be cleaned and reused.