UNIVERSAL SIZE: This winter warm LED knitted hat has high elasticity and won't compress your head, suitable for most kids over 10 years old, various head sizes for men, womenMaterial: Double layer and soft acrylic fabric, warm, comfortable and skin-friendly winter knitted LED hat keeps head warm, cute style, suitable for indoor and outdoorColorful LED Hats: Light up your celebrations with colorful blinking LEDs, the perfect Christmas decoration. Absolutely cool to use at a Christmas party. Add fun to your vacationSuitable for: Light up Christmas hat is the perfect flashlight hat for family, kids, friends, as a gift for Christmas, Halloween, New Year, birthday, music festival party, it is a big hit in the festival and will get a lot of compliments