The Under Armour Women's ColdGear Reactor Vest is a popular choice among women who prioritize both insulation and breathability in their activewear. This sleeveless vest features ColdGear Reactor technology, which adapts to your activity level to provide the right amount of warmth and breathability. The vest is made with a lightweight and water-resistant shell, ensuring protection against the elements. It also offers a high-visibility design with reflective details, making it suitable for outdoor activities in low-light conditions. With its innovative technology and functional features, the Under Armour Women's ColdGear Reactor Vest is a top pick for women seeking a versatile and high-performance activewear vest.