On Running Core-T 1 Men's – Jay is a lightweight performance running T-shirt designed to keep you comfortable through every training session. Crafted from breathable, lightweight fabric, it delivers unrestricted movement without weighing you down, making it ideal for everything from daily runs to intense workouts. Its clean, single-color design offers effortless versatility and easy styling, while the classic athletic fit makes it a reliable year-round staple. Finished in the Jay colorway, the Core-T 1 combines everyday comfort, functional performance, and minimalist style for runners who value simplicity and versatility.