The 32 Degrees Women's Packable Down Vest is a lightweight and versatile option for women's thermal activewear. This vest is filled with 650-fill power down, providing excellent warmth without adding bulk. It features a packable design, allowing you to easily compress and store it in a bag or backpack. The vest also has a water-resistant finish, making it suitable for various outdoor activities. With its practical features and affordable price, it's no surprise that this vest is a popular choice on Amazon.