Arcteryx Women's Phase AR LS Zip Neck - in stock now. FEATURES of the Arcteryx Women's Phase AR Long Sleeve Zip Neck Phasic fabric offers soft touch and exceptional moisture management Hybrid mapping reduces bulk while improving 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 reduce odour