Master the world’s most hostile environments with the TEKO Expedition 5.0, our warmest, most protective sock engineered for high-altitude mountaineering and Arctic conditions. Precision-crafted in the Italian Dolomites, the Expedition 5.0 is the definitive choice for professional mountain guides and explorers who require an uncompromising thermal barrier against extreme cold. The Expedition is an over-the-calf design with an elastic section above the ankle for extra hold whilst wearing high boots.
This model is built using premium, mulesing-free Merino wool. By maintaining the natural integrity of the wool fibres, we deliver exceptional thermoregulation and moisture management—critical in preventing dangerous dampness in sub-zero temperatures. The extra-heavy 5.0 cushioning provides a massive thermal buffer from frozen ground, while the over-the-calf height ensures complete coverage inside heavy double boots, eliminating cold spots and gaiter irritation. Backed by the TEKO Lifetime Guarantee, it is gear designed for when equipment failure is not an option.
Suitable Activities:
Winter mountaineering and high-altitude climbing
Arctic and Antarctic expeditions
Winter camping, bushcraft, ice climbing, and polar research
