Abstract: A visor attachable above a side window of a vehicle with a portion curving and extending outwardly and in accordance with the configuration of the forward and top edges of the window opening to shield and deflect rain, snow and noise from entering the passenger compartment through a partially opened window and a wall forming a recessed area in a portion of the visor to reduce air pressure therein as the vehicle travels forward, the wall also forming an inner pocket on the inside of the visor and the wall provided with a plurality of spaced apart small round holes extending through the wall to cause a venturi effect which ventilates stale air from the passenger compartment through the round holes. A rib extends generally horizontally from the wall and divides the depression into two parallel low pressure channels and an outwardly projecting lip is formed along the outward edge of the visor.