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The Arc'teryx Phase SL Short-Sleeve Crew refuses to be pinned down to one season or activity. Whether you're outdoors running, hiking, climbing, or skiing, or you're at the gym escaping bad weather, the Phasic SL is engineered to keep you dry; you'll be extra-comfortable, too, thanks to the new, softer fabric.

  • Lightweight Phasic SL fabric provides enhanced breathability to regulate comfort during aerobic activities
  • Multidimensional polyester yarn in Phasic fabric wicks moisture with remarkable speed, while soft, fine polypropylene yarn features embedded silver-ion technology to fight odors
  • Mechanical stretch allows plenty of freedom of movement and a close, next-to-body fit that encourages wicking
  • Flatlock seams won't chafe under pack straps or with repetitive motion
  • UPF 25-rated protection prevents sunburn on your high-altitude adventures