PX velcro ones here too, cheap, keep your feet warm for a couple of hours easily if it’s dry, less effective with a bit of spray and quite easily defeated if soaked, still much better than nowt…
I have also taken to wrapping my shoe/ankle in clingfilm, then putting the overshoes on, that extra little water resistant layer does actually make quite a difference, slowing water ingress and trapping some heat.
Like most have said overshoes are a temporary solution and obviously not as effective as some posh goretexy insulated winter boots, but this is the UK and winter here is not really that harsh, or that long typically so £10-15 to muddle through a winter or £90+ for the ideal (but obviously pricier in the short term) solution… Your choice.