No-Fuss Cooling : Boasting natural P-CM cooling technology, it requires no electricity and automatically freezes at temps below 28 for a refreshing, uninterrupted coolness all day long.Improve health performance : Say goodbye to summer discomfort and quickly cool your head, maintaining a good mental state and physical comfort in hot environments.Safe and Soothing : The skin-friendly and non-irritating TPU material of our ice pack hat insert ensures a safe and comfortable fit, providing discomfort-proof relief while preventing frostbite damage. Enjoy a soothing and comfortable experience!Strong Grip : Its stable buckle ensures a secure fit on your head, preventing any worry of slipping. Whether you're playing sports or doing heavy work, this insert provides the strong grip and security for all-day comfort.Multi-Scenario Relief : Beat the heat while commuting to work or school with this ice pack hat insert. Good for activities like running, fishing, and golf, as well as household chores, agricultural operations,and construction sites.