What is the function of rain guards? Is it necessary to install them?

[MalachiDella]

Rain guards can effectively prevent rainwater or strong wind from directly blowing into the car, improving ventilation efficiency; when driving in the rain, opening the window can also prevent the window from fogging up. It is necessary to install them in rainy areas. The following is a related introduction: 1. The function of rain guards: In any environmental condition, they can maintain the convection of fresh air, ensuring that the air inside the car is suitable for human needs; since they maintain the convection of fresh air, they will not cause glass fogging under any circumstances, which affects visibility and operation, thereby increasing driving safety; 2. The quality of rain guards: The quality of rain guards mainly depends on two aspects. One is the material of the rain guards, some are made of plastic, and some are made of synthetic resin. Resin has higher quality in terms of thickness and flexibility. The other is the adhesive of the rain guards. Some domestic adhesives may not stick firmly or tightly, and rainwater may flow down along the gap during heavy rain. As for the wind noise issue, there is actually little difference before and after installation.