Made with advanced, PVA cooling technology, the 8935MF Hi-Vis Ranger Sun Hat keeps you cool and shaded in the heat. This polyester sun hat features a wide brim for face and head coverage while 360-degree mesh venting maximizes airflow for breathable comfort. PVA, an evaporative cooling technology, is an effective, comfortable solution for heat-stress prevention. Ultra-absorbent microfiber retains water while remaining soft and comfortable. Run the inside rim of the sun hat under water for a minute to activate instant cooling relief that lasts up to 4 hours. Reactivate the cooling technology by soaking in water again. Sun hat is ideal for workers needing shade. It is also great for recreational activities like fishing, hiking, gardening and more. Hat fits a variety of head sizes. Drawstring closure keeps hat securely in place. High-visibility colors keep workers safe and seen. Machine-wash and air-dry for material longevity.