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, womenMaterial: 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 outdoorColorful 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 holidayFit 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 complimentsEasy to Use: 6 colorful LED flashing lights powered by 2 * CR2032 lithium coin cell batteries (included). Turning the switch to "ON" position to activate the lights. 36 hours of running time, if its done, you can change the batteriesWhy Choose Our Light Up Christmas Hat? 1. Changing Led Lights -- Classcial Christmas pattern hat with mutative LED Lights, will be popular for kids and adults. 2. Warm Material: Made of the Knitted Cotton, can withstand the cold of winter, warm and fashion. 3. Full Size: Fit a wide range of head sizes for most kids over 10 years, men, women, great for family or team, when a family or a team brings this hat together, you will definitely become the focus.Product Specifications: Product name: Christmas knitted hat Product size: length 24*width 21*thickness 2.5cm [error 1-3cm] Style: dark blue snowman Scope of use: party/prom/Christmas/etcDelivery Quantity: 1 Piece