The Outdoor Research Women's Ferrosi Vest is a popular choice for women seeking a lightweight and breathable activewear vest. Made from a blend of nylon and spandex, this vest offers excellent stretch and mobility. It features a wind-resistant and water-resistant finish, making it suitable for various outdoor activities. The Ferrosi Vest also has a full zip front, zippered hand pockets, and a stand-up collar for added convenience. With its durable construction and comfortable fit, it's no surprise that this vest is a best seller on Amazon.