The Nike Women's Aeroloft Flash Vest is a popular choice among women looking for a sleeveless insulated lightweight safety activewear vest. Made with a combination of polyester and spandex, this vest offers excellent insulation and flexibility. It features a zippered closure and a stand-up collar to keep you warm and protected from the cold. The vest also includes reflective details for enhanced visibility during outdoor activities. With its innovative Aeroloft technology and stylish design, the Nike Women's Aeroloft Flash Vest is a top-selling option on Amazon.