The Arc'teryx Women's Atom LT Vest is a high-performance sleeveless windproof vest that is designed for active women. It is made from a combination of nylon and polyester and features Coreloft synthetic insulation for excellent warmth. The vest has a slim fit and a full zip closure. It also has two zippered hand pockets and a stand-up collar. The vest is lightweight and breathable, making it perfect for layering. Whether you're hiking, climbing, or skiing, this vest will provide the necessary protection and comfort.