Run farther in comfort with the On Running Performance Run Sock High U – Black | Eclipse, designed with targeted cushioning and breathable ventilation panels to keep your feet cool, supported, and blister-free. The ergonomic, foot-shaped construction provides a secure fit, while integrated arch support enhances stability on every stride. Finished with a ribbed structure, contrast logo detailing, and reflective yarn on the cuff, these lightweight 36g socks deliver unmatched comfort, performance, and visibility.