The Under Armour Women's ColdGear Reactor Vest is a popular choice for women seeking a sleeveless windproof thermal vest that is both stylish and functional. Made with a lightweight and breathable polyester shell, this vest is equipped with ColdGear Reactor insulation, which adapts to your activity level for the right breathability and warmth. It features a stand-up collar and a full zip closure to keep the wind out. The vest also has zippered hand pockets and an interior chest pocket for convenient storage. With its slim fit and sleek design, it can be worn as a standalone piece or layered under a jacket for added insulation. Whether you're running, skiing, or simply running errands, this vest is a versatile and performance-driven option.