The Under Armour Women's ColdGear Reactor Vest is designed to keep you warm and comfortable during your outdoor activities. It features ColdGear Reactor insulation, which adapts to your activity level to provide the right amount of warmth. The vest is made from lightweight and breathable fabric, allowing for optimal temperature regulation. It also has a fitted silhouette and a stand-up collar for a stylish look. Whether you're hiking, skiing, or running, this vest is a reliable choice.