It is a great hidden danger to our safety if we cannot see the rearview mirror while driving in the rain. In severe cases, it will endanger our lives and the lives of others. The rain-proof sheet helps prevent rain, allowing you to obtain a clearer rear view and a safer driving experience, and increase the driving safety factor. When the weather is sunny, protect the rearview mirror of your car. Effectively prevent scratches and scratches on the mirror, shading, and reduce the reflection of strong light in hot weather. The adhesive on the sun visor of the rain cover will not cause marks to the car, and will not cause damage to the car. Just tear off the adhesive and install it on both sides of the car's rearview mirror, and press to make it firm.