Features 1. LOVE TO SAVE ENERGY: Built-in solar sun power panel solar hat save can energy, environmentally friendly and long lifespan, no battery required. To save our earth, use of green power solar energy and turn the fans on. 2. COMFORTABLE COOL IN SUMMER: A golfs cap that has a mini fan cooling the face, solar powered fan that cools your face off in the Sun, Unique hook and loop closure design on solar cap that make you easy adjust size to match you need. 3. FASHION DESIGN: Perfect for the hot summer, outdoor activities, cycling, hiking, walking, baseball sport, travel, fishing, daily life and so on. 4. MATERIAL: The baseball cap is made from polyester cotton and plastic and solar drive material, durable, breathable, comfortable and lightweight. It can also resist static electricity, absorb moisture and perspiration, and feel comfortable and not irritating. 5. SOLAR PANEL DRIVE FAN: Baseball cap has a good sunshade effect with a mini fan at the front of the brim; No need the battery or electric power is required to drive through the solar energy; Only if the sun is shining, the fan will start automatically. Then small fans will automatically stop running indoors or in the dark. Specification Material: Cotton Color: Red, Yellow, Blue, Black, White Size: 13 x 17 cm, Cap circumference: 53-59 cm Weight: 60 g Package Include: 1 Baseball Cap