The incredibly lightweight Helium Down Hood Jacket is the most versatile jacket you can own. Perfect as a second layer under a shell, but also great to wear on its own. It's windproof, and thanks to its DWR-treated nylon shell fabric, it protects against light precipitation. It packs down to a very small size. Plus, it's insulated with premium 90/10 duck down and feathers, responsibly sourced and compliant with the "Track My Down®" program, for guaranteed warmth.