With the X-SOCKS® TREK PIONEER, you can master any challenge in your favorite sport and improve your performance on demanding trekking tours. Specifically designed for trekking enthusiasts, these special socks from the X-BIONIC 4.0 generation help you move smoothly across any terrain. Fourteen integrated technologies within the tightly woven material fulfill their performance-enhancing functions and prove that even outstanding quality can be perfected through continuous innovation. The optimally shaped Air-Conditioning Channel® 4.0 provides even better ventilation, the improved Lambertz-Nicholson Achilles tendon protector 4.0 offers enhanced protection, and the unique Partial Compression® delivers maximum muscle control with its continuously cooling effect. The skin-neutral, hypoallergenic, and lightweight Mythlan® fiber combats germs and odors.