The Nike Women's Aeroloft Flash Running Vest is a sleeveless activewear vest that is designed to keep you visible and comfortable during your runs. The vest features reflective elements that enhance visibility in low-light conditions, making it perfect for early morning or evening runs. The Aeroloft technology provides lightweight insulation, keeping you warm without weighing you down. The waterproof and windproof fabric ensures that you stay dry and protected from the elements. With its sleek design and high-performance features, this vest is a top-rated choice for women looking for a stylish and functional activewear vest.