For high-output endeavors, our new fast-drying Short-Sleeved Fore Runner Zip-Neck delivers on-the-fly ventilation. Its fast-wicking 100% recycled polyester fabric is ultralight and highly breathable, while the deep front zipper (with chin guard for comfort) further keeps you cool. Flatlock seams provide no-chafe, next-to-skin comfort, and a locker loop lets you dry it out afterward. The set-in sleeve design gives comfort and enhanced mobility, and the short self-fabric collar wicks moisture. With 15-UPF sun protection, Polygiene permanent odor control and reflective logos on left hem and center back neck.