Our warmest weight base layer crew neck in the Phase family is appropriate for cold temperature, high-output activities. Hybrid mapping of Phasic™ SV (in the body) and Phasic™ AR (in underarm area) fabrics, in addition to the flatlock construction and comfortable next-to-skin fit, eliminates excess bulk and rapidly transfers moisture for efficient evaporation. Benefits include improved temperature regulation and layering possibilities.
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Arc'teryx Fit Guide - Next to Skin Fit
These snugly-fitting garments are made with stretch fabrics to fit next to the skin to enhance moisture management and thermal efficiency. Used for base layers which integrate well with Expedition, Trim, Athletic and Relaxed Fit.
To find out how to calculate your body measurements, view our Sizing Charts:
Moisture wicking base layer for interval activities.
SV | Severe Weather
Employs the most durable materials for prolonged use and provides the most weather protection in the harshest weather conditions.
Full Feature List
Minimal odour retention
Hydrophobic materials will not absorb water
Mechanical stretch textile for unrestricted mobility
Flatlock construction improves next-to-skin comfort
Breathable fabric sections under arms
Anatomical shaping for fit and comfort
Cuff & Sleeves Configuration
Logos & Label Configuration
Phasic™ SV—92% polyester, 8% polypropylene, UPF 50+, 150 g/m². Double knit textile with mechanical stretch composed of multidimensional polyester yarns that wick moisture laterally to dry quickly, plus polypropylene yarns that have silver-ion encapsulated into the fibre for long-lasting odour control. The interior fabric is a combination of polyester and polypropylene and slightly lofted for mid-level insulation, while the face is 100% polyester, smooth and durably pill resistant.
Phasic™ AR—87% polyester, 13% polypropylene, UPF 50+, 145 g/m². Double knit textile with mechanical stretch composed of multi-dimensional polyester yarns that wick moisture laterally to dry quickly, plus polypropylene yarns that have silver-ion encapsulated into the fibre for long-lasting odour control. The smooth outer face is durably pill resistant and a lightly lofted interior adds light insulation.