J.B. Field's - Icelandic "30 Below XLR" Merino Wool Thermal Sock Size:Large TRU® ZIP TECHNOLOGY

TRU® ZIP TECHNOLOGY

lightweight

Integrated optical fiber and two high-powered LEDs provide full-length illumination

Made from recycled PET for sustainability

it also provides the ability to gradually release even under high tension

J.B. Field's - Icelandic "30 Below XLR" Merino Wool Thermal Sock Size:Large TRU® ZIP TECHNOLOGYThe J. B. Field's "30 Below XLR" sock is ideal for those who spend a lot of time outside in cold weather and is perfect for winter sports. With a full, heavyweight cushion and soft merino wool, they are sure to keep your feet warm and comfortable in the most extreme conditions. The only differences between these socks and the "30 Below Classic" are the double cuff to help socks stay up better and both ankle and arch support, which prevents slippage