I was in a bad plane crash, and don't let anyone see my legs. As I result, even when it was pretty hot, like 35C I was wearing cotton exercise pants. I sewed in some dime store micro fleece to amply cover all contact areas. I had two pair, and wear them all the time. I pre-coat any likely chafe areas with Peneten diaper creame, great stuff. I wash whenever I can. I didn't have any problems with chafe, while when on shorter rides over the years, I would always get minor chafe even on some pretty short runs, say 10 miles. There is a lot of me to cram over a Brooks. I think the non-lycra may have helped, a lot more breathability.because the material is not stuck to one. Same would be true of chaps vs pant, and ponchos vs jackets. All this aero stuff is not necesarily that practical.