The Patagonia Women's Down Sweater Vest is a popular choice among women looking for a sleeveless lightweight safety packable activewear vest. This vest is made from 100% recycled polyester and filled with 800-fill-power Advanced Global Traceable Down, providing excellent warmth and insulation. It features a zippered front, two handwarmer pockets, and a stand-up collar for added protection. The Down Sweater Vest is also packable, making it easy to carry and store when not in use. With its eco-friendly materials and reliable performance, it's no surprise that this vest is a best seller on Amazon.