The Under Armour Women's ColdGear Reactor Vest is designed to provide optimal warmth and comfort during cold weather. It features ColdGear Reactor technology that adapts to your activity level, providing the right amount of warmth when you need it. The vest is made from high-quality materials that offer excellent insulation and breathability. The sleeveless design allows for easy movement, making it perfect for outdoor activities like hiking or skiing. It also has a full-zip front closure for easy on and off. With its sleek design and performance features, this vest is a great addition to any active woman's wardrobe.