Luminous Shoelaces for Sneakers Canvas Flat Sports Shoes Laces Glow In The Dark

They need to absorb light through sunlight, lights, flashlights, or even moving screens.
After 30 minutes of light absorption, they emit light for about 4-5 hours.
The stronger the light, the better.
(You can also add a note to the order to tell us your questions and requirements)
This shoelace does not require batteries only heat energy that can be luminous, not hurt the body, not pollute the environment.
This shoelace is a special process before use need to use some light to make the shoelace night light.