I've never bought OR underwear and remember when they didn't make clothes like they do now but they hit the mark. I sweat, a lot, in the humid south. Iraq was more comfortable but this is the first and only boxer-brief I've ever owned I forgot I was wearing underwear during a hump. No riding, chaffing or sweat educed gorilla-butt. I've tried smart wool to patagonia to rei and while some are better than others by far and even have the reputation of the best by many mountain guides who I believe never tried these. Ice climbing in NH would of been perfect in these when you drive to the site and weight isn't an issue.