Ergodyne - EGO12594 8935MF Hi-Vis Sun Hat is a lightweight, breathable sun protection hat with advanced, microfiber cooling technology lining the rim for relief in extreme heat. 150D polyester sun hat is rated UPF 50 plus and features a wide brim for complete face and head coverage. 360-degree mesh venting maximizes airflow for breathable comfort. High-visibility color and 1" reflective tape are ANSI 107 compliant to keep workers safe and seen. Run the inside rim of the sun hat under water for a minute to activate instant cooling relief that lasts up to 3 hours. Reactivate the cooling technology by soaking it in water again. It will retain water without bulking. Sun hat is ideal for workers needing shade. It is also great for recreational activities such as fishing, hiking, gardening and more. Hat fits a variety of head sizes. Drawstring closure secures it in place. Machine-wash and hang to dry.