Last year I spent an embarassing amount of money on WoolX. Only had a year, so I can't. I do worry about durability when it costs so much. I worry about working in it. The research I did some say they do. I got with 15% off and free shipping. They run promos. Watch their site or sign up for emails.

I also got the Carhart Gforce which they are market as fast drying cotton. I don't know if it is. But I like it better for doing physical work.

I have under UA 3, and don't think they are warm. I worry the woolx snowmobiling last year which is very sweaty and hot. Curious to try it stand hunting this year. It is so comfy I wore the top as a shirt. Which is expensive shirt for me.

I tried the SmartWool 250's this week during opening deer rifle season. I like them. As others mentioned above, today's merino wool is not your grandpappy's wool. The reason why is because of they way they process wool today: they separate the course outer sheath of the wool fibers (that's what scratched and itched in the past). The SmartWool 250's are very warm. In fact, down to the 40's, I am comfortable wearing just the SmartWool 250 crew top with no jacket. In the 30's, I'll want to throw on a good jacket on top of the top layer, but I am very impressed with the performance of the SmartWool 250 gear. Plus wool wicks sweat and keeps you warm even if you get wet (in the rain, for example).