The North Face Women's Aconcagua Vest is another top-rated sleeveless insulated lightweight safety activewear vest on Amazon. This vest is made from a blend of nylon and polyester, providing durability and warmth. It features a zip-in-compatible integration system, allowing you to layer it with other compatible garments for added insulation. The vest also has zippered hand pockets and an internal chest pocket for storing small essentials. The Aconcagua Vest is designed to be lightweight and packable, making it easy to carry and store. With its sleek design and reliable performance, it's no wonder that this vest is highly rated by customers on Amazon.