【ONE SIZE FITS MOST】This cool winter hat is made of ultra-soft and excellent insulating acrylic blend material, which has great elasticity and is both breathable and warm. One size fits most, men, women and teenagers from 15 years old and up. 【THREE ADJUSTABLE BRIGHTNESS】Built-in hat light, there are 3 levels for you to choose the most suitable brightness. You can adjust the brightness by pressing the ON/OFF button. It can last up to 10 hours at the lowest level, 4 hours at the middle level and 2 hours at the highest level. 【RECHARGEABLE HEADLIGHT】The LED headlamp hat is rechargeable, detachable and washable, so you no longer need to waste money on batteries. You can remove it to charge with laptop, power bank, socket, car charger, etc. It takes about 1-2 hours to fully charge and lasts 2-10 hours of working time. Simply remove the light and hand/machine wash. 【WINTER HAT WITH LIGHT】 The lighted hat allows you to work or play hands-free in low light, ensuring safety and convenience. You can wear it outdoors for fishing, cycling, hunting, camping, traveling, running, walking, car repairs, anywhere you want to work with lighting and have your hands free. 【STOCK STOPPER TEENAGE BOYS GIRLS】 The hat light is ideal for fishing, jogging, cycling, camping, hunting, hiking, crafting, grilling, dog walking, car repairs or any other activity that requires a headlamp.