Solid cables, but soft. Flexible enough for whatever your needs might be.
I have a laptop AND a tablet, and the thing is, with these things, the cable is always getting pinched. What happens is, over time the cable ENDS collapse, or get misshapen (you can’t see it with the naked eye, but trust me), and no longer make solid contact.
When your device says, “plugged into a low-power outlet (or it doesn’t register at all!),” or similar, you need a new cord. So you buy these, super-cheap, and you’re golden! I recommend buying several, as a backup.