Retailers' Descriptions

Here's what other sites are saying:

The breathable, midweight Phase AR Zip Neck Long-Sleeve Top from Arc'teryx is an awesome base layer for high-output activities in cold temperatures.

- REI refers to the men's version

On Sale. Free Shipping. Arcteryx Men's Phase AR LS Zip Neck FEATURES of the Arcteryx Men's Phase AR Long Sleeve Zip Neck Phasic fabric has soft touch and exceptional moisture management properties Hybrid mapping reduces bulk, improves thermal regulation Flatlock construction improves next-to-skin comfort Zip neck provides rapid ventilation while a taller collar provides warmth Provides sun protection (UPF 50+) Encapsulated silver ions reduces odour

- Moosejaw refers to the men's version