800mah battery can be charged through solar energy or usb for continuous use. fans on both sides of the brim for hands-free cooling. made from moisture-wicking, waterproof material with a breathable mesh top. three-speed settings for customizable comfort during outdoor activities. Item Name: Sun Hat Material: Polyester Fiber Battery Capacity: 800mAh Charging Method: USB/Solar Powered Speed: Three Speed Adjustment Features: Wide Brim, Versatile, Moisture-Wicking