I cut reflectix to fit inside the window openings and had them edge bound. This stuff works really well in the hot summer sun to keep inside temps in check.
I made pieces for all the lower windows and just made 3 pieces for the poptop windows, depending on where the sun is and how you’re parked, 1 for either the front or back window and 2 that will fit in either side windows. I have the CCV top and place them in between the layers, for the Sportsmobile’s top, you could sew some Velcro tabs to hold it up.
Reflectix BP48010 Double Pack Insulation, 48 in. x 10 ft
https://www.amazon.com/dp/B000BPAULS...HXY0T331MQ665P