Designed for active use in alpine conditions the Atom LT hooded jacket is filled with Coreloft insulation, a thermally efficient and robust fill which can be compressed down for convenient storage in the integrated pocket. The Atom jacket is designed for wintry missions and is finished with a DWR coating, filled with hydrophobic insulation which will retain warmth even in the wet. Highly breathable the Atom jacket has permeable side panels of Polartec Power Stretch with Hardface technology to help vent excess heat during exertion.