The Under Armour Women's ColdGear Reactor Vest is a popular choice for women seeking a sleeveless windproof vest with advanced insulation technology. This vest features UA ColdGear Reactor intelligent insulation, which adapts to your activity level for the right breathability and warmth. It has a full zip closure, two zippered hand pockets, and a stand-up collar for added protection. The ColdGear Reactor Vest also has a slim fit design, making it flattering and stylish. Whether you're running, hiking, or simply running errands, this vest is a versatile and practical choice.