This new reflector is kind of exciting new invention. It’s called Retroflective Vinyl and it can turns from black color to white (and reflective). If you use it properly on your vehicle, bike for example, this reflectors retroflective vinyl is invisible as it will blend so well on your bike.
Retroflective vinyl does its magic to turn from black color to white is because if this material is light responsive. So, when you are riding in the night, even a headlights shines will turn the vinyl completely to white reflective reflector.
The down side is that someone could steal your bike and you have to explain it to the police. It’s black, no it’s white. It’s complicated.