The Arc'teryx Women's Cerium LT Vest is a top-rated down activewear vest known for its exceptional warmth and lightweight design. It is made with a durable nylon shell and filled with 850-fill power down insulation, providing maximum warmth without adding bulk. The vest features a slim fit design that layers well under a shell jacket or over a base layer. It has zippered hand pockets and an internal chest pocket for convenient storage. The Arc'teryx Women's Cerium LT Vest is a high-performance option for outdoor activities in cold weather.