The material blend of the XC Performance Merino socks combines the moisture-wicking properties of technical fibers with the ability of merino wool to regulate temperature and resist odor formation. - The "Suppronation® Bandage" structure provides a great balance of support and flexibility during the push-off phase, helping with endurance during long activities. - Excellent comfort in cool and cold conditions, excellent durability in use Like other merino wool products we sell, these socks are "mulesing-free," meaning the wool production does not involve the painful mulesing process for sheep.