first of all, suck my dick. secondly, if you know anything about basic physics, friction on the inside of the toe cap would stop it from sliding up or down. im pretty sure even someone as fucking stupid as you can put the toe caps in the right spot just like i do. im glad they work for you..for myself and countless others, they're steaming piles of floppy leather shit. whats completely laughable is how bad you want to suck Union's cock. Guess what? Ive looked at basically every toe cap I could find and Union's are by far the most worthless of the bunch. They're flat (no curvature at all), they have textured leather that gets worn down to flat in 5 days on the hill, and they dont fit over a majority of boots.
But just in case you dont want to read all of that, heres a tl;dr : go fuck your mother
Like I said, you continue to prove that you know nothing.