I am a real fan of wool. But not necessarily the Woolrich stuff. I have clothing made by Swanni in New Zealand. It is much less expensive than King of the Mountain or Sleeping Indian. Very tight weave and not bulky at all. I have hunted in temps down to 40 below (wind chill) and never had a problem. And this is while bowhunting the late season 20' up in a tree.
Long