The Under Armour Women's ColdGear Reactor Vest is a high-performance activewear vest that is perfect for women who lead an active lifestyle. It is made from lightweight and breathable materials that provide warmth without weighing you down. The vest features a sleeveless design and a hood that can be converted into a collar, allowing you to adjust your look and level of coverage. With its innovative ColdGear Reactor technology, this vest adapts to your body temperature, keeping you comfortable in any weather conditions. Whether you're hitting the gym or going for a run, this vest will keep you warm and stylish.