It may be what that link says Pete, but my ungodly long experience with wool garments tend to disagree with that assessment. I found wool to get just as soggy as cotton on the INSIDE. I've always sweat heavily so maybe my experience isn't the norm. But I don't remember a single time pulling off DRY woolen undergarments. But I'm one of those poor saps that sweat in 30* weather when just walking.