Atom Jacket Men's is a warm-even-when-wet insulated jacket designed for everyday use, hiking and trail outings. Built as a warm-even-when-wet synthetic layer for high-output days, it’s worn on its own or as a midlayer. Product Type: Men’s insulated jacket. Material: Synthetic Fill. Coreloft synthetic insulation stays warm in wet weather. Wind resistant and breathable for high-output activities. Updated with an FC0 DWR finish for a lower footprint. For changeable conditions, wear it under a men’s shell jacket and pair it with men’s hiking shoes for trail days. Everything you love about the Atom Hoody (minus the hood), the Atom Jacket is the layer you can count on to see you through multiple high-output activities. Wear it solo for chilly forest hikes with windy summits, climbing at the crag and hanging at the campsite, or as a midlayer for touring and wet winter objectives. The Coreloft synthetic insulation stays warm even if you run into light weather, making it a better alternative to down for high-output days year round. What's been updated: Updated with a FC0 DWR finish for a lower footprint.