The Under Armour Women's ColdGear Reactor Vest is a top-rated sleeveless waterproof activewear vest that offers exceptional warmth and comfort. It is made with ColdGear Reactor insulation, which adapts to your activity level for the right breathability and warmth. The vest is also water-resistant, making it suitable for outdoor activities in light rain or snow. It features a full zip front and a stand-up collar for added protection against the cold. With its stylish design and reliable performance, the Under Armour Women's ColdGear Reactor Vest is a popular choice among women's activewear.