The Under Armour Women's ColdGear Reactor Vest is a top-rated sleeveless insulated waterproof windproof activewear vest on Amazon. It is designed for cold weather activities and provides excellent warmth and protection. The vest features ColdGear Reactor insulation, which adapts to your activity level for the right breathability and warmth. The waterproof and windproof shell keeps you dry and protected from the elements. The vest also has a high collar and a full-zip front closure for added warmth and coverage. It is made of durable and lightweight materials, ensuring comfort and performance. The Under Armour Women's ColdGear Reactor Vest is available in various sizes and colors, allowing you to choose the perfect fit and style for your outdoor activities.