Icebreaker MW zip
After using this for ~ 2 weeks backcountry skiing, I have been quite impressed at its performance. I find it to be a little itchy while sweating (especially between my back and ski pack), though sweat also does not seem to feel as "clammy" with wool vs my other synthetic baselayers. It regulates body temperature much better than my Capilene mid-weights, and is much more enjoyable to wear around the house than synthetics as well. I initially had reservations about using wool baselayers, though this piece has convinced me otherwise.