Wear as a mid-layer or stand-alone, the ARC'TERYX Women's Atom Jacket will keep you warm as the temperature drops. The lightweight minimal bulk jacket features breathable Coreloft insulation which is efficient for optimal thermal performance and the Tyono 30 nylon shell is wind and water-repellent. The ventilated underarm panels will keep this jacket breathable as your pace and body heat up, while the no Slip Zip front zipper keeps the zipper from slipping open when you only want to add excess airflow. An inner zipped chest pocket and 2 zippered hand pockets will be sure to keep all those essentials secure.