The Arc'teryx Atom SL Hoodie is just what you need for mild-weather protection or cold-weather layering. The thoughtful blend of tech fabrics includes stretch fleece, durable Tyono™ nylon, and synthetic Coreloft™ insulation for an effective lightweight midlayer. The Atom SL Hoodie fits easily under weatherproof shells for comfortable layering. It is a reliable go-to for adventures in dynamic weather.