Originally Posted by MNDan

I will never wear synthetic long underwear again after trying merino wool long johns - it's ultra comfortable, warm when wet, and simply doesn't stink - even after wearing it for a week straight every day (which I will be doing next week again). I have a bunch of different Minus 33 long underwear, which I think is a great value, but any will do. I just noticed this year that even Costco is carrying merino wool & it looks to be pretty decent.