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 conditions—as low as 40ºC!

Pair these winter socks with a liner sock to 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.)

• 85% Preshrunk Wool, 15% Nylon
• Thermal Socks for harsh winters 
• Full Terry Cushion adds comfort, extra warmth, and protection
• Heavyweight: 162- 200grams(M-XL)
• Large (Men's 8–13 Shoe / Women's 9–13 Shoe)
• Made proudly in Toronto, Canada