This solar powered fan hat is by far my best purchase to keep me cool.

Solar Fan Outdoor Fishing Hat,
🌈 USB Charging, Cool in Summer!✨
 🔥Whether you are fishing, camping, hiking, or engaging in any other outdoor activities,💪 this Solar Fan Hat is a must-have accessory.😎  
This upgraded fan hat is designed to be worn on the head, leaving your hands free. 
Built in a mini fan at the front of the brim, cooling the face. You can hang the fan around your head and take it everywhere, will not feel tired or uncomfortable.  
🛡️Built-in high-speed motor, stable and quiet effect.  
⚡Long-lasting battery life ensures a cool day  【Effective Sun Protection】 Our solar cooling hat is designed with fan on the sides of the hat, Made of comfortable and breathable materials, it can effectively block harmful light and keep the head cool and breathable. 
Strong sunscreen ability, can protect against ≥98% of UV rays, protect your skin from sunburn.  Less Than 11oz, the light weight won't burden you.   
【Comforable & Breathable】 85% polyester will ensure efficient moisture wicking. Water-repellent finish complements the moisture-wicking sweatband. The top of that it has a mesh layer to keep your head cool and breaths.
 【Comforable & Breathable】 This fan hat has two power supply modes, solar power supply or USB charging, you can choose the suitable power supply mode according to the actual situation.