If you're all about performance, Mammut's lightest insulated jacket is the right cold weather protection for your mountain adventures. The responsibly sourced hydrophobic down filling is placed in small chambers to achieve this peak performance, insulating even in wet conditions. Under the ultralight, recycled nylon outer material, the down is able to expand to its full capacity for optimal insulation. Whether as an extra-warm or outer layer, or as a small-packed thermal backup, the Aenergy IN Hooded Jacket is designed for all female mountain athletes who want lightweight equipment without compromises.