The Arc'teryx Women's Cerium LT Vest is a highly popular option for women's reflective down activewear. This vest is made with a lightweight and durable Arato 10 shell and filled with 850-fill power goose down insulation, providing exceptional warmth and comfort. The reflective details on the vest enhance visibility in low-light conditions, making it suitable for outdoor activities like climbing or camping. The Cerium LT Vest features a slim fit design that is both flattering and allows for easy layering. It also has zippered hand pockets and an internal chest pocket for convenient storage. With its premium quality and performance-driven design, the Arc'teryx Women's Cerium LT Vest is a top pick for women's reflective down activewear.