RUN EXPERT EFFEKTOR OTC socks are specifically designed by X-Socks for running and trail running. The upper sits very high on the calf to provide a high level of compression that boosts blood circulation, limits muscle fatigue and increases performance.

The foot, meanwhile, benefits from targeted reinforcement and support zones that maximize your comfort during the run. In fact, the heel and toe area receive greater thickness on contact with the sole of your shoe.

A tighter zone runs from the plantar vote up to the ankle to energize the crowd.