I use my Columbia Gallatin/Monarch Wool as a go to gear during the winter up here when its not really cold(-20 and above), a buddy of mine got the Weatherby wool this past fall and used it for duck hunting to -20 and said it was awesome. Its got a liner in it thats almost like windhsear or windstopper making it that much warmer. Its not cheap but what is that works well?
