Run farther in comfort with the On Running Performance Run Sock Mid U, engineered with targeted cushioning and breathable ventilation panels to keep your feet cool, supported, and blister-free. The ergonomic, foot-shaped construction delivers a secure fit, while integrated arch support enhances stability with every stride. Finished with a ribbed structure, contrast detailing, and reflective yarn on the cuff for added visibility, these lightweight 29g socks offer the perfect balance of comfort, performance, and style.