Lasting power and protection fuel your winter adventures. The X-SOCKS® X-COUNTRY PERFORM CREW specializes in cross-country stride support with technologies like the Air-Conditioning Channel® for moisture management, Lambertz-Nicholson Achilles Tendon Protector 4.0 to prevent strain, and Suppronation®-Bandage for stability. Stay dry, stable, and focused for longer in cold seasons.