The Arc'teryx Women's Atom LT Vest is a popular choice for women seeking a lightweight and breathable activewear vest. Made from a combination of nylon and polyester, this vest offers excellent stretch and mobility. It features Coreloft synthetic insulation, which provides warmth even when wet. The Atom LT Vest also has a full zip front, zippered hand pockets, and a stand-up collar for added convenience. With its durable construction and versatile design, it's no wonder this vest is a best seller on Amazon.