The Under Armour Women's ColdGear Reactor Vest is a top-rated insulated fleece vest designed to keep you warm and comfortable in cold weather. It features UA ColdGear Reactor technology, which adapts to your activity level to provide the right amount of warmth. The vest is made from a lightweight and breathable fabric that wicks away sweat, keeping you dry and comfortable. It has a fitted silhouette and a stand-up collar for added style and protection. Whether you're going for a run, hitting the gym, or simply running errands, this vest is a great addition to your activewear wardrobe.