Our fluorescent LED light up baseball cap is made of soft and durable optical fiber fabric, featuring 11 different colors that can be easily switched with a button. It is adjustable for all head sizes and can be charged with a USB. This cap is perfect for parties, concerts, festivals and more, adding fun to your night experiences! Features 1. Quality material: our Luminous LED Baseball Cap hat is made of quality optical fiber fabric and LED light, light and soft, odorless, can serve you a long time; It can be gently hand washed. 2. Adjustable size: the flashing LED baseball cap with its adjustable back makes it very comfy to wear, no heat, no radiation, friendly for health, adults, boys or girls can freely wear the glowing cap without the struggle of unfit. 3. Light up colors: LED fiber optic hat lights up in 11 colors, you can choose a mode by pressing the switch, making you stand out at the party, and attracting people's attention. 4. USB recharging: our light up hat built in 3.7V/1500mAH battery, supports USB charging and can be applied continuously for 20 hours on a single charge. 5. Wide application: the luminous led baseball cap makes you shiny in the dark and be the star of parties, particularly at concert parties, carnival, neon parties, Christmas, music festivals, disco, nightclubs and so on, add more fun to your parties. Specification Material: Optical fiber Color: White, Black Size: 19 x 28 cm Weight: 150 g Package Include: 1x LED Baseball Cap