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Phase Series: Moisture wicking base layer | SV: Severe Weather. Moisture-wicking base layer zip neck top, constructed using odour-control fabric; Ideal as mid-level insulation during stop-and-go activities.
Our warmest weight base layer zip neck in the Phase family is appropriate for cold temperatures and 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. 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 for faster venting. Engineered for superior moisture management and rapid dry-times during stop-and-go activities, this form-fitting top keeps the user drier and more comfortable. Encapsulated silver-ion fibres provide durable and long-lasting odour control.
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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
Anatomical shaping for fit and comfort
Laminated chin guard
Zippers & Fly Configuration
Quick-pull 1/2 length zip for easy venting
Cuff & Sleeves Configuration
Logos & Label Configuration
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.
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.