The Nike Women's Aeroloft Running Vest is a popular choice among women who are looking for a lightweight and breathable activewear vest. It is made from a combination of polyester and nylon, providing a comfortable and durable fit. The vest features Nike's Aeroloft technology, which uses lightweight insulation to keep you warm without weighing you down. It also has a quilted design and a full zip closure for easy on and off. With its reflective details and water-repellent finish, this vest is perfect for early morning or evening runs.