The Under Armour Women's ColdGear Reactor Vest is a top-rated sleeveless insulated waterproof high-visibility activewear vest on Amazon. It is made with a durable and water-resistant fabric and features ColdGear Reactor insulation, which adapts to your activity level for the right breathability and warmth. The vest also has a high-visibility design with reflective details, ensuring that you stay visible in low-light conditions. It has a slim fit and a stylish design, making it suitable for both outdoor activities and everyday wear. The ColdGear Reactor Vest is lightweight and packable, making it easy to carry and layer. With its innovative insulation technology and functional features, it is no wonder that the Under Armour Women's ColdGear Reactor Vest is highly rated by customers on Amazon.