The Calvin Klein Women's Chevron Quilted Packable Down Vest is a stylish and practical option for women's thermal activewear. This vest is filled with 90% duck down and 10% feathers, providing excellent warmth and insulation. It features a chevron quilted design and a stand-up collar for added style and protection. The vest also has a packable design, allowing you to easily compress and store it. With its fashionable look and functional features, it's no surprise that this vest is a top seller on Amazon.