Went to a job today and plumber was there anyway he had these plastic type disposable shoes that you just stepped into with your shoes or trainers or whatever (a bit like slippers) and they just gripped on to said foot wear i asked him where he got them and he said some dutch company but they have stopped producing them
they looked very profesional and they will not slip like the blue overshoes i use
i have been looking on the web to see if i can track some down but with no luck
