Premium wool mixed with targeted mesh areas gives you warmth for cold winter runs and helps to stop your feet from overheating as the run warms up. The socks provide a close, supportive fit thanks to the dynamic arch band. A natural, irritation-free fit is attained thanks to the smooth toe seam and anatomical left/right fit. Premium wool keeps your feet warm and wicks sweat naturally, while smooth fabric mesh zones aid airflow. Made with 52% wool, 24% nylon, 20% polyester, and 4% spandex. Machine wash. Reflective elements are included. Not intended for use as Personal Protective Equipment (PPE).