Stay warm and comfortable during your outdoor workouts with the Under Armour Women's ColdGear Reactor Vest. It is made with ColdGear Reactor insulation, which adapts to your activity level to provide the right amount of warmth. The vest also features a water-resistant and windproof shell that keeps you protected from the elements. With its sleeveless design and hooded feature, this vest allows for maximum mobility and versatility. Whether you're running, hiking, or doing yoga, this vest is a great addition to your activewear collection.