Icelandic 40 Below Wool Thermal Sock

When the temperatures drop, the J.B. Field's Icelandic 40 Below Wool Thermal Socks step up. Designed for extreme cold—down to -40ºC—these heavy-duty thermal socks contain an incredible 85% preshrunk wool for unmatched warmth and insulation. Whether you're trekking through Arctic conditions, working outdoors, or simply battling a harsh winter, these socks keep your feet warm, dry, and comfortable.

Featuring a full terry cushion for extra comfort and protection, these socks provide superior heat retention while wicking moisture away when paired with a liner sock. Built for durability, they're proudly made in Toronto, Canada, and come in extended sizes to accommodate all adventurers.

PLEASE NOTE: These socks run large. We recommend wearing a liner or sizing down for the best fit.

Key Features:

• 85% preshrunk wool for extreme warmth and moisture control
• Heavyweight construction: 162–200 grams (M–XL)
• Full terry cushioning for extra insulation and comfort
• Designed for temperatures as low as -40ºC
• Made proudly in Toronto, Canada