Features: Solar powered cooling fan hat with built in battery ensures continuous airflows, eliminating heat during sunny/cloudy days through efficient energy conversion and storage. Use breathable polyester fabric enhances ventilation, stable construction and 300mAh rechargeable solar panel for daily wear comfort. Great for teapickers, outdoor workers, and adventure seekers requiring sun protections and cooling solution during prolonged exposure to summer heat. Perfect companion for teaplantations, fishing trip, hiking adventures, and gardening where simultaneous shade and temperature regulation critical. Durability and multipurpose sun hat combines simple design with practical functionality for sustainable outdoor lifestyles. Specifications: Component: Polyester Product Size: Approx. head circumferences 54-58cm/21.26-22.83inch Power Supply: Solar/USB Charging Battery Capacity: 300mAh Color: 5 optioanl color as pictures shown Package Includes: 1PC Solar Fan Hat note: Please allow 0-1cm error due to manual measurement Due to the differences between different monitors, the picture may not reflect the actual color the item.