Expedition socks designed to excel in the most remote, extreme places on the planet.Designed to be worn in exceptionally cold conditions inside mountaineering footwear, the Bridgedale Explorer Heavyweight Merino Endurance Boot Socks are perfect for frosty adventures. With excellent overfoot ventilation and carefully considered details including flat toe seams and Fusion Technology that wicks moisture away from your feet. Knee length sock to fit smoothly under trousers for all day protection, extra warmth and next-to-skin comfort. Full heavyweight cushioning throughout for extra warmth, impact resistance and comfort, while the snug merino and new wool blend will keep your toes warm in the harshest weather. Moisture managementPerformance fitFlat toe seamOverfoot ventilationY-heelShockzoneThermofit37% Merino Wool, 14% New Wool, 29% Nylon Polyamide, 19% Endurofil/ Polypropylene, 1% Lycra Elastane