A Vent Visor, Also Commonly Known as a Rain Guard, Rain Visor, Window visor, or Window Deflector, Protects you and the Interior of your Car, truck or SUV from Wet Weather. It Deflects Rain, Snow, Sleet, Wind and Hail Away from the Windows of your Behicle, thus Allowing you to Keep your Windows Open even in Inclement Weather. A Vent Visor will also Help you Save on Fuel Costs and Improves Gas Mileage because you Don?t Have to Run your Air Conditioner to Keep yourself Comfortable while Deflecting Wind (Like an Airplane Wing) to Minimize the Wind Resistance Known as Drag that Impedes your Vehicle's Forward Motion.