There was a story years ago about some scientists who dropped a box of tablets into a village somewhere that had no previous contact with modern tech. They went back some time later, and the kids had figured out, not only how to use them, but had networked them too. I wonder what ever happened with that, or if it was even true? I suppose I should google it.
I tried a pair but didn't feel like they could stay tight enough, kind of felt like they were floppy but they didn't have a half size smaller. Is that what you use?
Don't know about them personally but given the industry would be suspicious of the quality. It's likely they're one of the few or only suppliers people can buy things from while incarcerated.