Undefine-X socks are temperature graded and are suitable for men and women in various situations, including running, working, and travelling. These socks have a unique fiber blend that keeps your feet warm, dry, and odorless. Because of its adaptability, wide applicability, and sweat-absorbent properties, it's ideal for everyday wear. Our casual running crew sock can be used up to 0 degrees Celsius and our technical performance socks can be used up to -10 degrees Celsius
