"they" wouldnt come from bike stuff companies then, would they ..?

Another bought but unused NEOS .. a lugged sole Galloshes New England Over Shoes, I think..
sell mine..

I just bought LL Bean Maine Boots, so dont need overshoes..

If there is an office dress code,
like going to the Courtroom, for Lawyers, that is understandable..

Manchester in UK? go to a high street shoe shop and ask..
galloshes, is an old word here for the kind of thing you describe.
molded rubber you pull over your shoes , to protect them from snow and slush.