The Under Armour Women's ColdGear Reactor Vest is a top-rated activewear vest known for its exceptional warmth and versatility. It is made with a lightweight and durable polyester shell and filled with synthetic insulation that adapts to your activity level, providing the right amount of warmth and breathability. The vest features a slim fit design that layers well under a shell jacket or over a base layer. It has zippered hand pockets and an interior pocket for convenient storage. The Under Armour Women's ColdGear Reactor Vest is a high-performance option for outdoor activities in cold weather.