The Under Armour Women's ColdGear Reactor Vest is a popular choice among athletes and outdoor enthusiasts. This vest is made from a blend of polyester and elastane, providing a comfortable and stretchy fit. It features Under Armour's ColdGear Reactor technology, which adapts to your activity level to provide the right amount of warmth. The vest also has a full zip closure, zippered hand pockets, and a stand-up collar for added functionality. Whether you're running, hiking, or hitting the gym, this vest will keep you warm and stylish.