I tried this on a few times but never wore it. I think I have an odd-shaped head! 🤣 From the Zyia website: Not only is this trucker-style mesh hat a great way to protect your face and eyes from the sun, it's an adorable accessory that looks great with both short and long hair. An all-mesh design maximized airflow, making it an ideal running accessory. But we're sure you'll love it just as much for hitting the mall as hitting the trail. Adjustable back strap lets you customize your fit. All-mesh design for maximum airflow. Solid bill blocks sunlight, protects face. Cotton-poly blend cushioned interior headband helps catch and wick perspiration. Size: Unisex, one size. Fabric: 60% Polyester, 40% Cotton.