Without the Arc'teryx Men's Iridine Crew Shirt, you are simply a human. With it, however, you become a master of all that is performance, a hero of the trail, able to last longer and go farther than the simple competition. This heavyweight contender performs best in colder temperatures when you need to get rid of perspiration as fast as you can produce it. Skytha polyester, a mid-weight piqué knit that manages moisture but more specifically protects your skin from damaging UV rays while you run, hike, or bike on sunny days. A HeiQ Pure finish on this fabric minimizes odors hour after sweaty hour of performance. Arc'teryx knows you like your creature comforts, too, so it ringed the neckline with super-soft, fast-drying Helius fabric that won't chafe or rub you the wrong way.