The J.B. Field's 40 Below Arctic Trail is one of the warmest thermal winter socks we 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 conditions—as low as 40ºC!
Pair these winter socks with a liner sock to help wick away moisture and keep your feet smelling fresher, feeling warmer, and blister-free.
Pre-shrunk Wool: We use only the finest quality of easy-care wool in our socks because it is such a versatile fibre. It is breathable and moisture-wicking, and helps regulate body temperature by keeping feet dry, preventing blisters, and controlling odour.
PLEASE NOTE: These socks run large. We recommend wearing a liner or sizing down, if possible.