Warm & Comfortable: this led christmas hat is really soft acrylic fabric, double layer winter knit christmas beanie hat, skin-friendly, to keep you head warm from 360 degree indoor and outdoor. Univeral Size: the high elastic warmer LED christmas knit hats fit wide range of head sizes for most boys, girls, men and women. EASY-TO-USE: 6 colorful LED flashing lights powered by 2 lithium coin cell batteries. You can find the on/off switch hidden inside seam, take off the paper barrier, then turn the switch to on position to activate the light. Importance notice: take off the layout before wash the led christmas beanie, otherwise it may break the battery. Fitted Occasion: Novelty Santa beanie hat with the unique patterns, catching people’s eyes, brighten up your holiday, one hat fit for all your Christmas/Halloween/New Year/Birthday/Music Festival/Ugly Sweater Holiday.