- Longlasting Cooling Experience: The inner lining uses physical cooling PCM technology to deliver a sustained cooling effect, helping you stay mentally alert. Safe, comCompatible table, and effective in varied environments.- Up to 2 Hours of Cooling: Provides cooling Compatible up to two hours during outdoor or indoor tasks that demand focus and endurance.- Broad Compatibility: Ergonomic, contoured design fits a wide range of head sizes and works with most headwear Compatible secure, comCompatible table wear.- ComCompatible t and Materials: PCM core with a soft, skin-friendly breathable lining; durable, easy to clean and maintain.- Size and Fit: One-size-fits-most ergonomic design Compatible a secure, comCompatible table feel.- Practical Use Scenarios: Cycling in hot weather; camping or fishing in sunny conditions; outdoor work or sports where sustained cooling is beneficial.