TEKO eco EXPEDITION 5.0 Merino Wool Socks - Extra Heavy Full Cushion

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.

This model is built using premium, Mulesing-free Merino wool that has been processed without chlorine to meet rigorous Bluesign® standards. 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

• Professional mountain guiding and Search & Rescue

Technical Specifications:

• Cushioning: 5.0 Extra-Heavy Full Cushion

• Material: 65% Merino Wool, 33% Recycled Polyester, 2% Elastic

• Height: Over-the-Calf (Below the Knee)

• Temperature Range: Optimised for -5°C to -30°C

• Origin: Made in Italy using 100% renewable energy