Nano Hydrophilic Technology. High quality transparent clear screen protector, PET+ Nano coating protective film with high transmittance. he rear mirror will be full of rain on a rainy day, obstruct the driver’s sight, easy to occur dangerously. This waterproof film will make your mirror clear, ensure your safety. Multiple functions, rainproof, waterproof, anti-scratch, protect your car. Easy to install and use, you are able to apply the waterproof film into the mirrors and windows according to the user manual. Wide application, it can also be used for car widow, bathroom mirror or other places that are easy to be foggy.