Review on Windshield Sun Exact Fit Minivans Sunshades by Mark Patterson

Ok for the price but the material is really thin. Similar design to the foldable sun visors you can find in auto parts stores but I remember they were thicker material and blocked a bit more light which kept the cabin cool. This blocks most of the incoming light, and the loose material around the edges allows you to shove it into the corners of the windshield where the round frame/spar doesn't get through, so it's a plus for blocking the sun. Helps reduce internal temperature; better than nothing. For better performance I would probably look for something isolated. The average size is a bit big for a Subaru Impreza.