The Arc'teryx Women's Atom LT Vest is a highly rated sleeveless hooded insulated waterproof activewear vest. It is made with a combination of synthetic insulation and breathable fleece panels, providing warmth and comfort in various weather conditions. The vest is also treated with a DWR (durable water repellent) finish, making it water-resistant and suitable for light rain or snow. The hood is adjustable and insulated, adding extra warmth and protection. Whether you're hiking, climbing, or simply running errands, this vest is a versatile and reliable choice.