Midlayer or standalone, Arc'teryx's Atom Vest is a proven performer across a range of seasons, landscapes and activities. With its most advanced insulation, fabrics, and design ever, this evolution builds on its legendary performance. Coreloft™ Compact insulation retains warmth if wet and withstands years of packing and unpacking, and the breathable, durable Tyono™ 20 shell resists wind and light weather. Stretch fleece side panels aid ventilation and freedom, and the entire vest packs into its own pocket PRODUCT FEATURES: Lightweight Fit Fitted Moisture-resistant outer face fabric Breathable Weight 200g / 7.1 oz .Compressible and packable• Insulated Wind resistant• Mid-height collar is insulated and fleece-lined, layers well Performance stretch fleece side panels give ventilation Resilient Coreloft™ Compact 60 insulation is breathable, warm, and light, performs if wet, and delivers loft retention that resists packing out Light, soft Tyono™ 20 is air permeable• Trim fit for base layer or light mid-layer use Performance stretch fleece side panels give ventilation Resilient Coreloft™ Compact 60 insulation is breathable, warm, and light, performs if wet, and delivers loft retention that resists packing out Light, soft Tyono™ 20 is air permeable DWR (Durable Water Repellent) finish repels moisture Dual lower hem adjusters Drop back hem• Laminated hem Two hand pockets with hidden zippers Internal chest pocket with zip• Dope dyed lining fabric Contains materials that meet the bluesign® criteria No Slip Zip™ front zipper• Custom TPU zipper pulls are easy to operate and glove-friendly Self: Tyono™ 20 denier shell with FC0 DWR treatment - 100% nylon Side panel fabric - 100% polyester Insulation: Coreloft™ 60 (60 g/m²) - 100% Recycled Polyester - bluesign Approved Material Lining: Dope Permeair™ 20D - 100% nylon - Dope Dyed, bluesign Approved Material (select colours)