Seems like an interesting concept to make your mirrors more visible during a rainy season
As Described On AliExpress:
Features:
100% Brand new and high quality
This is an innovation that can solve the problem that you can't clearly see the double glasses in the rainy days, so that your vision is clearer and the travel is safer.
It can protect your driving sight on rainy days.
It is a universal size exterior mirror. You can freely cut into pieces as needed
Waterproof, anti-fog and dustproof effect is good.
Nano hydrophilic technology.
So do you chuck a few on your passenger and driver windows too then???