Features: With four-point cotton lining, it is beautiful, durable and environmental for protection. When there is strong sunshine point-blank, fan will start, saving much energy and is high technology. Three wind adjustable indoor and outdoor can be used, making it ventilate and cooling. Four-Point fixing is safer, Y-shaped chin strap is more comfortable to wear, and push-insert adjustment is more durable and convenient. Fit for construction workers, sanitation worker, firefighters and other construction workers in the sunshine. Specifications: Material: Imported ABS engineering plastics Color: Yellow/ Red Size: 22x27x12mm/8.66x10.63x4.72inches Weight: Approx. 450g/15.87ounces Package Includes: 1 x Solar fan cap note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!