Arc'teryx's lightest, most packable insulated vest provides light warmth, air-permeable comfort, and transitional weather protection for high output in cold conditions.

Fortius™ Air 20 - 84% nylon, 16% elastane, Coreloft™ 40 Insulation -100% Recycled, 20D Nylon Plain Weave Liner, Altitude Air Nylon Stretch Woven Mesh w/C0 DWR

Lightweight Fortius™ Air 20 face fabric balances outstanding air permeability with light wind resistance | FC0 DWR (Durable Water Repellent) treatment repels water | 100% recycled 40gsm Coreloft™ insulation is breathable, warm, and light, performs if wet, and resists packing out | Zippered pocket secures small essentials, stows jacket for compact transport | Reflective details for added visibility in low light | Fitted, with ergonomic patterning for mobility and comfortable layering under the Norvan Shell