The Under Armour Women's ColdGear Reactor Vest is a top-rated insulated activewear vest designed for cold weather. It features UA ColdGear Reactor intelligent insulation that adapts to your activity level for optimal warmth and breathability. The vest has a slim fit and a stand-up collar for added protection against the elements. It also has zippered hand pockets and a secure chest pocket for storing essentials. The Under Armour Women's ColdGear Reactor Vest is highly regarded for its innovative technology and performance-driven design.