Universal Size: This winter warmer LED knit hats with high elasticity, it will not oppress your head, can fit a wide range of head sizes for most kids over 10 years, men, women Material: Double layers and soft acrylic fabric, warm, comfortable and skin-friendly winter knitted led cap keeping the head warm with adorable style, well for indoor and outdoor Colorful LED Hat: With the 6 colorful blinkings LED, light up your celebration, perfect decoration for Christmas Cool used at Christmas party definitely cool Add some fun to your holiday Fit for: Light up Christmas Hat is perfect flashlight beanie for family, kids, friend as gift at Christmas, Halloween, New Year, Birthday, Music Festival Party, A big hit on holiday, will get lots of compliments Easy to Use: There is "off / on" on the hat, you can control the effect of the light with one touch The battery is hidden inside the hat and runs for 36 hours If you are finished, you can replace the battery