With the super lightweight X-SOCKS® SKY RUN TWO, you gain the necessary boost for trail and mountain runs. Like their predecessors, the men's socks of the X-BIONIC 4.0 generation are characterized by the highest material quality. The weight-saving and extra breathable Mythlan® mesh knit on the instep is a proven comfort feature, as is the disinfecting and odor-reducing Sinofit® footbed. You can still rely on the stabilizing effect of the Suppronation® XX-Cross® bandage. Thanks to consistent innovation, the new models offer even more technological precision. The completely redesigned Air-Conditioning Channel® 4.0, with its newly shaped, tapering air channel, ventilates the sole of the foot even more effectively. And the Lambertz-Nicholson Achilles tendon protector 4.0 features a two-part design that offers even better protection for the sensitive area above the heel.