The Nike Women's Aeroloft Flash Running Vest is a stylish and functional sleeveless activewear vest. It is made with a lightweight and water-resistant fabric that will keep you dry and comfortable during your runs. The vest features Nike Aeroloft technology, which provides lightweight insulation to keep you warm without weighing you down. It also has reflective details for visibility in low-light conditions. Whether you're training for a marathon or just going for a jog, this vest is a great choice.