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: 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/m ) - 100% Recycled Polyester - bluesign Approved Material Lining: Dope Permeair 20D - 100% nylon - Dope Dyed, bluesign Approved Material (select colours) *Weight 200g / 7.1 oz *Fit Fitted *Moisture-resistant outer face fabric *Breathable *Lightweight Arc'teryx Women's Atom VestX000006895