Nike ACG never misses a chance to keep things cool. Built for fast-moving trail days, this long-sleeve top is designed with Radical Air Flow. An extremely breathable, open-hole fabric that channels breathability — it helps you stay comfortable when the pace picks up. Tested by elite runners and ready for adventure, it's all breeze, no brakes. 100% Polyester Nike Dri-FIT Technology Open Hole Knit Crewneck Fold Over Elastic Trim Printed Branding Style Code: IQ5848-100