You might be able to, but definitely not immediately. All of the hired equipment must be handed out before you’re able to swap!
If you are really unhappy with what you’ve been given, pop into the hire shop on Monday to see if they have anything left!
With bigger trips, there’s a pretty slim chance you’ll be able to swap, just because you don’t like the way it looks! We’ve been in shops before where all they have left is a pole and one pair of kid’s ski boots!