I went ahead and purchased a UV meter that measures the combination of UVa and UVb. I was pleasantly surprised that the meter remained essentially at zero for UV coming through the windshield but especially the roof. The side windows do in fact allow some UV rays to enter. So now I am having the two side windows tinted with material that will stop the UV. Obviously in Calif, the tinting of windows even if clear is against the law. I tried to see if I could get a prescription from my Dermatologist. But he said no as did my Primary Doctor. Kind of surprised.