Women's Nike Aeroloft Jacket provides warm performance when it's on and lightweight packability for when it's not. It's ideal for dark, chilly routes with body-mapped insulation, wind resistance and reflective elements. Benefits Include: Nike Aeroloft technology provides ventilated lightweight warmth. Goose down insulation is mapped to the body for maximum warmth. Lower back lining is perforated offers ventilation. Materials: 100% POLYESTER.