A streamlined, slim fit comes fortified with PrimaLoft insulation, so you remain warm in the cold without feeling your movements compromised or constricted. Here, 80g PrimaLoft Gold Insulation Active Eco, added to key areas, feels lightweight and breathable as it regulates your body's core temperature through dynamic and static activities, and resists water and lets you move once you're on the track or trail. As a result, you can keep this adaptable, hybrid jacket from Eastern Mountain Sports on