Product name: Solar Fan Hat Cap circumference: 56-60cm/22-23.6in Product material: polyamide Power supply: usb charging/solar charging Product features: 1.SOLAR FAN OUTDOOR HAT: This upgraded fan hat is designed to be worn on the head, freeing your hands. There are mini fans built into the front of the brim to cool your face. You can hang the fan on your head and carry it around without getting tired or uncomfortable. 2.Solar and USB charging fan can work continuously for more than 7 hours, and the Angle can be adjusted by 90 degrees. 3.EFFECTIVE SUN PROTECTION: Our solar cooling hat is designed with fans on both sides of the hat, made of comfortable and breathable material, which can effectively block harmful rays and keep your head cool and breathable. 4.COMFORTABLE AND BREATHABLE:85% polyamide will ensure effective moisture wicking. The waterproof material is complemented by a moisture wicking sweatband. It is topped with a mesh layer to keep your head cool and breathable. 5.WIDE APPLICATIONS: Suitable for outdoor sports such as golfing, hiking, running, biking, farming, fishing, shopping, beach play. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact me we will give you some suggestion, but it is for you reference only. Package includes: 1 pc Solar Fan Hat