The Under Armour Women's ColdGear Reactor Vest is a high-performance sleeveless activewear vest that is perfect for women who love to stay active in cold weather. It is made with a lightweight and water-resistant outer shell, ensuring that you stay dry and protected from the elements. The vest is insulated with ColdGear Reactor technology, which adapts to your activity level to provide the right amount of warmth. It features a slim fit and a stylish design, making it a popular choice among women. Whether you're running, hiking, or skiing, this vest will keep you warm and comfortable throughout your workout.