personally I just think they are gobstic pretencious pieces of nothing that only annoy and irrittate on sight leading to more frustration,( somewhat similar to some fat munter in a Chelsea tractor ) ill feeling and pent up anger culminating in seeing how much aggro and greif you can give them without the inevitable caution and charge that ensues if you kick the ■■■■ out of it…a hi viz is an aid to being seen.fair play to that…the polite cretins that wear them are an irritation to be scorned at best…but that’s just me thnking aloud 