The Patagonia Women's Down Sweater Vest is a popular choice among women looking for a sustainable and high-quality sleeveless insulated vest. It is filled with 800-fill power down insulation, providing excellent warmth in cold weather. The vest features a zippered front, two zippered hand pockets, and a stand-up collar. It is also lightweight and packable, making it a versatile option for outdoor activities. With its commitment to sustainability and reliable performance, it's no surprise that this vest is a best seller.