If you prioritize performance, the lightest Mammut insulation jacket is the perfect cold protection for your mountain adventures. This top performance is achieved with responsibly sourced, hydrophobic down filling placed in small chambers, which also provides insulation in wet conditions. Its full capacity and warmth can be ideally utilized under the ultralight, recycled nylon outer material. Whether as a warmth layer, outer layer, or compact warmth backup – the Aenergy IN Hooded Jacket is designed for all female mountain athletes who demand lightweight gear without compromise.