The Nike Women's Aeroloft Running Vest is a popular choice among women who are looking for a sleeveless lightweight vest specifically designed for running. It features Nike Aeroloft technology, which provides lightweight insulation to keep you warm without overheating. The vest is made from a combination of polyester and nylon, offering a comfortable and breathable fit. It has a full zip closure and a stand-up collar for added protection against the wind. The Aeroloft Running Vest also features reflective details for enhanced visibility during low light conditions. Whether you're going for a morning jog or participating in a race, this vest will keep you comfortable and visible.