The North Face women's Aconcagua Jacket is a perfect down layer for cold winter days. This warm but classy jacket is designed with a form-flattering cut, so you look good whether walking around town or playing in the snow. The North Face women's Aconcagua Jacket is constructed with 100% nylon satin twill and insulated with 550-fill goose down, so you know you will stay warm. The jacket is also compatible with complementary North Face shells for extra versatility. Material: Nylon, Twill, Synthetic.