Uptracks and traverses, transitions and descents – backcountry travel is not linear. Output, temperatures, and conditions shift, and you need to stay comfortable through it all. Insulation balancing warmth, airflow, and protection – this is a go-to backcountry piece.

Features:

• Proton series: Air permeable mid layer insulation with abrasion and weather resistant outer surface
• GORE-TEX INFINIUM™ at the yoke and hood delivers zonal durable windproof protection and helps shed light snow and sleet
• Fortius™ Air 50 outer balances warmth: airy four-way stretch fabric is soft, comfortable, wicks moisture
• FC0-DWR (Durable Water Repellent) finish repels moisture
• Coreloft™ synthetic insulation provides warmth with minimal weight and bulk
• Articulated patterning for unrestricted mobility
• RECCO® reflector aids search and rescue in emergency situations
• Hood configuration:
• Low-profile, GORE-TEX INFINIUM™ hood
• Single pull adjuster does not restrict vision
• Fits under a helmet
• Full front zip
• Arc'teryx Bird logo
• Chest pocket with zip
• Two hand pockets with zippers
• Adjustable hem drawcord
• Fitted fit: patterned to stay close to the body through the chest, waist, hip, and thigh. Its low profile eliminates bulk, moves with the body, and fits comfortably under outer layers
• Weight: 365 g
• Sustainability: contains materials that meet the bluesign® criteria
• Materials:
• Contrast: 2L GORE-TEX INFINIUM™ with PFCec-free DWR
• Self: Fortius™ Air 50 - 84% Nylon, 16% Elastane - FC0 DWR
• Lining: 20D plain weave - 100% Nylon
• Insulation: Coreloft™ 40 (40 g/m²) - 100% Recycled Polyester