You will master even the most demanding hikes effortlessly and on sunny days, you can rely on the pleasantly cooling effect of the X-SOCKS® TREK X LINEN. The valuable linen content in the material increases durability and provides a natural climate control effect. The optimally shaped Air-Conditioning Channel® 4.0 enhances the temperature-regulating effect with targeted ventilation along the sole of the foot. The protective functions for the toes, instep, and ankle are now complemented by the Lambertz-Nicholson Achilles tendon protector 4.0 with its newly shaped cushioning zones.