Built to handle unpredictable mountain weather, the Atom Hoody pairs a wind-resistant Tyono™ shell with a moisture-shedding FC0 DWR treatment to block the elements. Breathable Coreloft™ insulation delivers reliable warmth even if it gets damp, making it a go-to for high-output days. Performance stretch fleece side panels eliminate excess heat when you are working hard on the trail or climbing at the crag.