The J.B. Field's 40 Below Arctic Trail is one of the warmest thermal socks they make, containing 85% preshrunk wool! This style was designed for people who require a sock to keep their feet dry and warm in the most extreme conditionsas low as 40C!

Pair these winter socks with aliner sockto help wick away moisture and keep your feet feeling fresher, warmer, and blister-free. (These socks run large. It's recommend wearing a liner or sizing down, if possible.)