The Under Armour Women's ColdGear Reactor Vest is a top choice for women who want a lightweight and breathable activewear vest. It features ColdGear Reactor technology, which adapts to your activity level to provide the right amount of warmth and breathability. The vest is made from a durable and water-resistant fabric, making it suitable for various outdoor activities. It has a slim fit and a stand-up collar for added protection against the elements. The ColdGear Reactor Vest also includes zippered hand pockets and a zippered chest pocket, offering convenient storage options. Whether you're running, hiking, or doing yoga, this vest will keep you comfortable and stylish.