The J.B. Field's 40 Below Arctic Trail is one of the warmest thermal 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 sockto help wick away moisture and keep your feet feeling fresher, warmer, and blister-free.
Don't require the extra length and looking for a slipper version of these socks?
PLEASE NOTE: These socks run large. We recommend wearing a liner or sizing down, if possible.
Sizes available: Medium (Men's 4–8 Shoe / Women's 5–9 Shoe) Large (Men's 8–13 Shoe / Women's 9–13 Shoe)
X-Large (Men's 14–16 Shoe)
Wool Socks: 85% Preshrunk Wool, 15% Nylon
Thermal Socks for harsh winters
Full Cushion: Full Terry Cushion adds comfort, extra warmth, and protection