Nike Women's AW84 Hat Imported Reflective elements to increase your visibility on low-light runs. Laser-perforated side panels increase airflow. Weight-reducing bill wicks sweat away from your forehead. Body/bill: Dri-FIT 70% nylon 6/24% polyester/6% spandex. Inner panel (sides): Dri-FIT 91% polyester (100% recycled)/9% spandex. Imported. One size fits most.