Material: canvas + cotton polyesterCap length: 7cm Cap width: 18cmCap depth: 10cm Cap circumference: 55-59cmAfter being exposed to natural glare, incandescent glare, flashlight, ultraviolet light, etc., the light energy is stored and slowly released in a fluorescent manner after stopping the light irradiation, so that the light can be seen at night or in the dark. a period of time. About Luminous: Just received the hat, there will be no luminous effect, first use strong light (sunlight, flashlight, lighting, lighting, or other strong light, etc.) to illuminate for a period of time, then it will shine in the dark. (It can also be lit during the day!) The effect at night is more obvious! Not absorbing light is the same as an ordinary hat, the night light is gone, and then absorb light! Can be used repeatedly)
