The Under Armour Women's ColdGear Reactor Vest is a popular choice for women who want a lightweight and breathable vest for outdoor activities in colder weather. Made from a blend of polyester and elastane, this vest is stretchy, moisture-wicking, and quick-drying. It features ColdGear Reactor insulation, which adapts to your activity level for the right breathability and warmth. The vest also has a stand-up collar and a full-zip front closure for added protection against the elements. With its slim fit and ergonomic design, this vest provides unrestricted movement and comfort. Whether you're running, hiking, or skiing, this vest will keep you warm and dry.