Features: Stay cooling outdoors with our solar powered cooling hat featuring built in fans and 4-8 hours of continuous airflows using efficient solar charging technology. Crafted with breathable polyester and adjustable headband, this lightweight sun hat combines durability with comfort for various head sizes. Designed for hikers, cyclists, and families seeking portable cooling solution during extended outdoor adventures. Optimize your camping trips, fishing excursions, or festivals with convenient temperature control under direct sunlight. This multifunctional outdoor cooling cap merges modern technology with versatile styles, offering sun protections while enhancing activewear aesthetics. Specifications: Power: Solar and USB Charging Component: Polyester Optional Color: As picture shown Size:approx. As picture shown Suitable for head circumference :approx. 56-60cm/22.04-23.62in Quantity: 1set Package Includes: 1pc Solar fan charging sun hat 1pc USB charging cable note: Please allow 1-3cm error due to manual measurement. please sure you not mind before you bid. Due to difference between different monitors, the picture may not reflect the actual color.