Wearing this hat is like wearing an ice-cold towel. Soak Chiller hats in cold water then wear them during your golf round. Chillers remain very cold for 5+ minutes, quite cold for 15+ minutes and comfortably cool until dry (1 - 3 hours). Re-chill with a quick refreshing splash as necessary. It stops sweat and stains plus it is wearable and crushable. It's made of an rich and soft ultra-light chamois. It will not fade. The unique perforated fabric allows ventilation, but, blocks the sun. It may even improve your golf game!