What should I do if the upper of my rubber shoes is broken?

Repair: If there is only a small crack or damage on the leather surface, you can use a professional leather restorer or upper restorer to repair it. Wipe the vamp clean first, then apply the repairing agent, and then wipe it with a cloth when it is dry.

Glue: If the upper is badly damaged, it can be repaired with super glue. Clean the vamp first, then apply glue to the damaged part and press it hard for a few minutes until it dries.

Find a professional master to repair it: If the damage is serious and you can't repair it yourself, you can find a professional shoemaker or shoemaker to repair it. They have professional tools and methods to help repair the broken vamp.