The Led cap made of 100% Cotton material. The led display is inside of the hat. If you do not want the led on, you can turn it off and use the hat as a normal one. You can edit your led smart hat with words, music patterns, images, and drawings. When you put on the customized led hat, you will be the coolest and eye-catching person on the Party, Concerts, Rave Festivals, Christmas, Halloween, Graduation. It can also show your ad slogan with any scenes.