I was out in the cold stuff this week end for about 8 hours total. I had on merino wool with UA over that, insulated bibs, heavy wool sweater, pile jacket,two stocking caps, face mask, insulated boots of course. On my hands I had mechanics gloves with large choppers near by(did not use them). I stayed pertty warm. I couldn't walk too good, but rolled great!
I have a lot of experience in the cold serving in the Infantry in Alaska, and carrying mail on a walking route in Northern Mn. So far, the only sure way for me to stay warm in the really cold stuff is to keeping moving.