This Magic Mirror Anti-Fog Shield coating protective film features high light transmittance and is waterproof, anti-fog, and anti-glare to improve the safety factor when driving. Often times, drivers underestimate the dangers of driving in adverse weather conditions, which can result in tragic accidents! This is especially true if the driver has never encountered bad weather on the road before. Conditions, such as snow, fog, or even heavy rain can make driving particularly dangerous for even the most careful drivers. Introducing the Magic Mirror Anti-Fog Shield, which contains a pack of 2 shields, for your car. This nanometer coating protective film, features high light transmittance, and is waterproof, anti-fog, and anti-glare to improve the safety factor when driving. How to Use It Use cleaning cloth to clear the dust and dirt off of the mirror, then peel protective cover from shield and spritz mirror and film with water (spray some alcohol, the product works better) before applying the rear view mirror shield to the mirror. Once applied, use a scraper to push out water and air trapped underneath shield, then remove outer film. Note: Please remember to wipe the dirt and dust off the shield. Features Gives a clear view in fog and rain Anti-glare property Easy to apply (instructions included) Prevents accidents in bad weather Protects side mirrors from scratches & smears Material: PET