LOL! I make no promises about how well they'll work if you step into water in the winter at -5 degrees. At that point, I suspect that theoretical damage to your shoes will be the *least* of your concerns, though...haha :-)

Do make sure to leave them sitting with nothing in them so they have a chance to dry out between rides, though. If they get wet daily, might want to keep them in front of a fan or something. Big thing is just make sure you don't stuff your socks in them after the ride or something that would keep them from drying out completely.