Arcteryx says about the Atom Jacket Women's
Light, soft Tyono 20 with DWR finish to repel moisture | Resilient Coreloft Compact 60 insulation retains loft | Performance stretch fleece side panels give ventilation | Mid-height collar is insulated and fleece-lined, layers well | No Slip Zip main opening, zippered hand pockets, internal zippered chest pocket with custom TPU zipper pulls | Cuff eases layering and removal | Dual hem adjusters