What Our Gearhead(R) Experts Are Saying:"I wore this on a tempo run and the contrast between the front and back panels is immediately noticeable. The tear-proof front handles wind and weather while the mesh back lets heat escape so the whole shirt just stays out of the way and lets me run."Race day demands a shirt that handles everything and asks for nothing in return, and the On Performance T-Shirt is built with that single purpose in mind. A tear-proof front panel shields against wind and the elements while wicking moisture away from the chest, keeping the fit close and the feel dry no matter how hard the effort climbs. Flip it around and the back tells a different story. Highly breathable mesh fabric pulls heat away and lets air flow freely across the shoulders and upper back, creating the kind of ventilation that keeps a hard pace feeling sustainable. The athletic fit sits close without restricting movement, and the stripped-down seamless construction eliminates friction points across long miles. The On Performance T-Shirt earns its place in the race kit by doing exactly what it promises and nothing more.