Shade hat with a solar powered fan : r/DidntKnowIWantedThat

Kool Breeze Solar Hats

Hard hat with a solar fan attached. Only works when you're facing into direct sunlight : r/CrappyDesign

Drip going into Lightfall. Big fan of the hat/helmet option here : r /DestinyFashion

Out of all the cool hats we've got on limited stock they choose this : r /RedDeadOnline

Prototype Solar Powered NF-A6x25 5V Hard Hat Fan : r/Noctua

r/raleigh You filthy animals! You have completely changed my life! : r /raleigh

Hard hat with a solar fan attached. Only works when you're facing into direct sunlight : r/CrappyDesign

This Solar Powered Fan Hat Keeps Your Noggin Cool While Working Out In The Sun

Solar Fan Hat, Hat with Fan Built in Solar

Hard hat with a solar fan attached. Only works when you're facing into direct sunlight : r/CrappyDesign

Poweraid® 1.1W SOLSOL™ Collection The Solar Hat that Charges Special Note: Not Currently Available for iPhone 7 or IOS10 Charges Android

Poweraid® SOLSOL™ The Solar Hat that Charges

DASHENRAN Wide Brim Solar Fan Outdoor Fishing Hat-Solar & USB Charging, Sunscreen Sun Hat with Fan, Solar Fan Hat Upf50+ (Black) : : Sports & Outdoors

This Solar Powered Fan Hat Keeps Your Noggin Cool While Working Out In The Sun