Our Extreme Cold Weather/Mountaineering boot sock is designed for extreme cold climates or rugged terrain. This is our warmest sock, featuring full terry loop cushioning throughout for maximum warmth. Elastic support at arch. Reinforced heel and toe for increased durability.
USAF Safe to Fly Certified FR/NMND and NAVAIR SOA Approved.
- 80% Merino Wool 19% Nylon 1% Lycra Spandex