These windows come with UV protection and are tinted. I have read of what seems a great idea to insulate the windows by cutting bubble wrap to fit them. I am a hoarder of bubble wrap as I send out cigars and beer at times, and my beer brewing stuff comes with large sheets of it.
Down here we always crack the windows and open the sunroof/moonroof on the truck because it gets so hot so quickly and takes too long to cool down to even a more comfortable level, which is why I figured the roof vents were a good idea to have open.