GIYF??? Had to Google it!
Ironically, for some activities, hi-viz can be fantastic camouflage. One example is urban geocaching, another is urban exploration. Without the hi-viz, geocachers look suspicious as they search nooks and crannies for a cache. With hi-viz and a clipboard, they look like they're there in some official capacity to carry out an inspection of some sort!Heard yesterday about the first man who invented high visability clothing. Designed for wearing in the trenches of the First World War. For some reason, it didn’t go down well