The Nathan Sports Run Cool Stash Hat is designed to keep runners cool comfortable and focused during warm weather training. Built with ultra lightweight stretch fabric it delivers a secure flexible fit that moves naturally with you. Mesh side panels maximize airflow to help prevent overheating while a soft wicking sweatband moves moisture away from your eyes. A hidden stash pocket adds unique functionality allowing you to store ice for cooling or attach a small light for visibility. Finished with a reflective adjustable back strap this running hat blends breathability performance and convenience for any run.