The Atom Vest is a proven performer across a range of seasons, landscapes and activities. Elevated with advanced insulation and material technologies, this versatile vest delivers its best, most versatile performance ever. Corelofta" Compact synthetic insulation retains warmth if wet and withstands years of packing and unpacking, and the breathable, durable Tyonoa" 20 shell resists wind and light weather. Stretch fleece side panels aid ventilation and freedom, and the entire vest packs into its own pocket. Fit & Design: Trim fit for base layer or light mid-layer use Mid-height collar is insulated and fleece-lined, layers well Performance stretch fleece side panels give ventilation Two hand pockets with hidden zippers Internal chest pocket with zip Dual lower laminated slight drop hem No Slip Zipa" front zipper Custom TPU zipper pulls are easy to operate and glove-friendly Compressible and packable Technology: Resilient Corelofta" Compact 60 insulation is breathable, warm, and light, performs if wet, and delivers loft retention Light, soft Tyonoa" 20 is air permeable DWR (Durable Water Repellent) finish repels moisture Wind-resistant Additional Details: Machine wash gentle low Tumble dry gentle low Do not bleach Wash dark colours separately Do not dry clean Do not iron Do not use fabric softener Double rinse Do not wring Contains materials that meet the bluesignA(R) criteria