Good article. I've never ridden more than a couple of hours in extremely high temps, like over 100. I'll have to give the wind resistance with wicking undergarments clothing a try on a long ride when it starts really heating up.
I fully agree with the information in this artica, BUTT I will add one thing regarding hemlet venting: I came home to west coast after completing the extreme fourcorners ride in May and June, It was Mid june when I left Florida west coast, mostly rain that day to Sidell LA. next day to Houstin and it wa hot! a two day break there seeing friends, then a day ride to Austin and two more days , more friends, then a major rideday from Austin TX to Deming NM. Once the day heaed up it was hot, I had plentyof water and used it so no problem, Next day same hot weather and made it to Mohave CA, I noticed tha evening that the top of my head felt quite warm; when I took off hemlet all seemed ok, after a shower I happened to look in mirror; MY nearly bald top of my head had a long RED mark from front to back. I initialy thought wa what is this?? then it dawned on meI had ran with the AIR vents in my Schulberth concept open all day long on both days, I was usinga Silks hemlet liner tha I would wash out each niteBUT the wind entering te top of the hemlet had BURNED me real gooddurring the two long hot days , This was on the GL 1800 with very good wind protection. My advice is to NOT RIDE LONG MILES / HOURS WITH HEMLET VENTS OPEN, it took quite awhle for me to recover from those burns and I still remember them very well.