One of the necessary life skills in the islands is the ability to fix a slippah. Yes, I know the mainland calls this minimal footwear sandals or flip-flops, but here they are called slippers or slippahs.
The usual failure is the clip that holds the strap into the sole,a simple plastic item subject to wear as you walk. You could say this is simple bad design, but it really does not fail often and slippahs are pretty cheap to start with.
Plus, it is easy to fix.
My wife can relate a dozen slippah fixing tricks from around the school where she works. Many of the kids wear them and teachers learn all the tricks to fixing them when they inevitably break. From putting a bread clip on the central knob, to using a paper clip to replace the little side clips.
In my case it is one of the plastic clips that has failed. I used some heavy wire a touch more substantial than a paper clip.