Arc'Teryx's warmest weight base layer zip neck in the Phase family, ideal for cold days in the alpine, this super-wicking base layer has mid-level insulation to keep you warm and dry, and a zip neck allows fast venting.
- 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