The Nike Women's Therma Sphere Element Half-Zip Running Top is a top-rated activewear vest for women. Made with Nike's Therma Sphere fabric, this vest provides lightweight warmth and insulation, making it ideal for cold weather workouts. The half-zip design allows for easy ventilation and temperature control, while the mock neck provides added coverage. With reflective details for visibility and a sleek design, this vest combines style and functionality for the modern active woman.