The Marmot Women's Jena Vest is a high-quality and stylish option for women's thermal activewear. This vest is made from 700-fill power down, offering exceptional warmth and insulation. It features a lightweight and compressible design, making it easy to pack and carry. The vest also has a durable water-repellent finish, ensuring protection against light rain and snow. With its premium materials and sleek design, it's no wonder this vest is a best seller on Amazon.