What Our Gearhead(R) Experts Are Saying:"Trail running tees live and die by two things: how well they manage sweat and whether they chafe after an hour of arm swing. This one handles both. The Dri-FIT pulls moisture fast enough to keep the fabric from clinging mid-run, and the soft underarm gussets make a real difference once the miles stack up. The cotton blend gives it a softer hand feel than a pure poly tee, and the reflective ACG logos add low-light visibility without making it look like a safety vest. Simple tee, done right."Trail running asks your top to do more than look good at the trailhead. The Nike ACG Trail Dri-Fit Short-Sleeve Top keeps its focus where it belongs, with Nike's Dri-FIT technology pulling sweat away from the skin throughout the run so the fabric stays light and the distraction stays minimal. Soft underarm gussets move with your arm swing and reduce chafing on the efforts that stretch past an hour. The 85% polyester and 15% cotton blend lands softer against the skin than a full synthetic without sacrificing the moisture management a real trail run demands. Reflective ACG and Swoosh logos add low-light visibility for dawn starts and late finishes without cluttering the clean profile. Built simple, built for the trail.