The Under Armour Women's ColdGear Reactor Vest is a popular choice for women who want a sleeveless hooded safety activewear vest that offers both warmth and breathability. This vest is made with UA Storm technology, which repels water without sacrificing breathability. The ColdGear Reactor insulation adapts to your activity level, providing the right amount of warmth when you need it. With its sleek design and innovative features, this vest is a top seller on Amazon.