Retailers' Descriptions

Here's what other sites are saying:

Leveraging advanced performance for high-output activities, the superlight, long-sleeve Arc'teryx Phase SL crew base layer wicks moisture rapidly and stretches with your body.

- REI refers to the men's version

Free Shipping. Arcteryx Men's Phase SL LS Crew FEATURES of the Arcteryx Men's Phase SL Long Sleeve Crew Next Gen Phasic SL fabric provides a softer touch, improved stretch and exceptional moisture management Flatlock construction improves next-to-skin comfort Crew neck line Gusseted underarms provide mobility and comfort Durable Anti Odour finish Updated style lines and improved fit Mechanical stretch textile for unrestricted mobility Merrow stitch seam construction reduces seam size Next-to-skin fit aids thermal efficiency and moisture transfer Anatomical shaping for fit and comfort

- Moosejaw refers to the men's version