Originally Posted by
terrymorse
Yeah, solar heating is a thing. As are evaporative cooling and convective heat transfer.
Taking all 3 factors into account, I still doubt that any garment is cooler than bare skin. I’m willing to be convinced otherwise by evidence. Got a link to some?
You're welcome to go hunting! I'm happy with my experience with them. The only thing I don't like is that can't tell if my forearms are staying wet. Dry forearms are my "you are about to have a health emergency" warning. I can't see droplets with sunsleeves on, though of course I could push them down for a few minutes if I were concerned.