Auto Ventshade 194375 In-Channel Ventvisor Side Window Deflector, 4-Piece Set for 2014-2018 Subaru Forester AVS Ventvisors continues to protect and comfort drivers on the road by allowing windows to stay open to help fresh air circulate the cabin, while keeping the rain out Precision engineered for a superior design, style, and a custom fit for every type of vehicle. Keeps rain out and lets fresh air in Easy no-drill application Reduces heat build up in parked vehicles by allowing window to be kept partially open No drill installation