In the field of fashion and trend, reflective materials are now one of the common elements in design. Regarding this, I think you can find similar items by opening the wardrobe or shoe cabinet?
This kind of material with reflective light as its main feature initially aims to use its characteristics to avoid risks at night, but now it is more used in detail design in the field of fashion and trend, adding reflective elements, which makes the original common clothing become different.  
   In recent years, the use of reflective fabric is obviously more frequent. Part of the reason is that the concept of "uniform" has become the design source of many brands. When the work clothes of specific professional groups are taken as the inspiration for design, the iconic reflective belts are naturally applied to more items, and various reflective clothing details are in recent years I believe that all of us can see the endless phenomenon.
Another part of the reason may be that, to a certain extent, it is linked with the attributes of futurism, science fiction and functionality. When these functional clothes become the mainstream and some design concepts of future themes appear frequently, these reflective elements have a higher frequency and become more and more popular.