The Under Armour Women's ColdGear Reactor Vest is a popular choice for women who want a sleeveless activewear vest that offers exceptional warmth and comfort. This vest is made from a blend of polyester and elastane, providing a soft and stretchy feel. The ColdGear Reactor technology adapts to your activity level, keeping you warm when you're inactive and cooling you down when you're working up a sweat. The vest also features a full zip front, zippered hand pockets, and a stand collar for added protection. The reflective detailing on the vest enhances visibility in low light conditions, making it perfect for outdoor workouts or evening runs. Stay warm and stylish with this versatile activewear vest.