Greetings fellow I-Paceians from sunny and HOT Souther California! I have had a few days of early summer out here and became intensely aware of the heat radiating from my tinted glass roof. I am tall 6'5" so my head sits up a bit higher (so I really feel it) but after a few days of this, i began to think about how much more AC and charge I was using just to combat my "ceiling heater" - I found this thread and ordered the sun shade. I realized it was just a mesh material on a frame so I came up with an idea to give it greater heat insulation.
I ordered a roll of foam heat shield thermal insulation from amaz.... and when the Sun Shade - T4K11558 arrived - I laid it out and traced the required shape and cut out the foam. I then installed the sunshade sandwiching the reflective insulation face up toward the glass and the white side down. The results were a better fitting sunshade and a thermal heat barrier that is nothing short of PROFOUND! I ran some errands today and after driving around in the 90°+ degree heat - I thought I would stop and do some testing with my digital laser thermometer..... the exterior of the glass was 122° and the interior celling was 84° with no noticeable heat emanating from the roof line. I was worried that I might miss the "view" from the glass roof and I quickly realized that unless you're in the backseat - you really don't even see it, unless you're looking straight up.
All in all I am really happy with the results and notice the car staying cooler when parked out in the sun.
Just thought I would share....