We teamed up with ultramarathoner Rob Krar to design a performance sock for long races. Featuring 4 Degree™ Elite Fit design for a performance-driven fit, our Athlete Run Series printed sock delivers comfort on even the roughest trails. It features breathable mesh areas with a Virtually Seamless™ tip and merino wool construction that naturally provides odor resistance and temperature regulation. Finally, its eye-catching pattern is matched only by your endurance.