Description: Lets the fresh air in while helping to keep the weather out. May not be legal in all states. Please check the laws of your state. Enjoy fresh air - even in inclement weather. Durable polycarbonate material will not fade or become brittle. Stylish and functional- Side Window Air Deflectors add a sleek look to your Forester and offer protection from the elements while allowing fresh air into the vehicle. Set of 4.