Get ready for long-distance running with X-SOCKS® MARATHON ENERGY. The further improved technologies of the X-BIONIC 4.0 product generation provide decisive impulses for outstanding performance. As an ambitious X-BIONIC® runner, you’re already accustomed to maximal comfort. Now this special sock for marathon sports surpasses itself.

Ventilation is now more efficiently controlled by ventilating technologies such as Air-Conditioning Channel® 4.0, Air Guide® and Traverse AirFlow.

The Lambertz-Nicholson Achilles Tendon Protector 4.0 protects against external mechanical influences.

Thanks to its narrow-arrow construction, the fabric adapts perfectly to the anatomy of the female musculoskeletal system with its slender, higher metatarsus and smaller heel bone.

Cuddly 3-ExpandLadiesStripes gently enclose delicate feet and prevent abrasion.