A hood that has a mini face cooling fan, fan that cools your face in the sun, unique hook and loop closure design on a hood that allows you to easily adjust size to match. The baseball cap is made of polyester cotton and plastic and sunscreen material, durable, breathable, comfortable and lightweight. Built-in energy panel Backing up the hat can be energy, eco-friendly environmental and long service life, no battery required. To save our earth, use green energy energy and turn on fans Perfect for hot summer, outdoor activities, cycling, hiking, walking, golf, sports baseball, travel, fishing, daily life, etc. Baseball Caps has a good sunshade effect with a mini fan at the front of the brim; No need battery or election power to cross solar power; Only if the shines, the fan will start automatically. Then the small fans will automatically stop running indoors or in the dark