The pedal so something clunky like boots you need to be very sensitive with how much pressure you put on the greatest some simple converse that can be very sensitive with how much pressure you need to.
The summer am bare foot in the summer am bare foot in the summer am bare foot in the summer am bare foot in the winter wear what ever is comfortable in the winter wear something that can wipe of easily see.
a pair of ceramic dutch clodhoppers
Definitely not sandals, especially if he uses a manual pottery wheel. Tennis shoes are probably the perfect thing, since you want a closed toe shoe that won’t easily come off. The boots will probably be too heavy, and he won’t be able to react as fast as he might need to if he’s on the pottery wheel. If you feel like spending the extra money, you might get a non slip shoe. Especially if he uses lots of water, and/or is slightly messy.
Good luck!