IMO,traditional clothing was developed over generations to help people survive in the local climate. Probably a good idea to always look at what was worn in the past.
For example, a survival handbook I read many years ago had a section on desert survival. In it, it recommended covering over with a white cotton sheet or something like it to, in its words, "dress like an Arab". Apparently, the idea was to reflect the strong sunlight (white) and create a mini-climate under the outfit that makes one cooler than if you did not have this covering. It always made sense to me. Mid-east traditional desert clothing was developed to aid in crossing some really hostile deserts; perhaps we should learn from them.
I tried something like this one day while sailing on the Chesapeake and suffering from one of our "Brain burner" hot/sunny days. I put on a white cotton long sleeve t-shirt (with an attached white hood). My companions in their short sleeve shirts were really complaining and suffering and thought I had lost my mind. Yet, I was quite comfortable. Totally counter-intuitive, but it worked.
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"Better is the enemy of good enough."