Interesting as my young daughter would be the main reason for me considering light tints on my wagon.
Do the screens roll up compactly when unused?
Are they a perfect fit as stated on their website?
They dont roll up. They sit inside the window frame so even when the window is down the blind remains covering the opening

they are perforated too to allow air through
Ask any one at Volksfest a few years back how well they worked. The back of my car was the coolest place on the site