I've owned several pairs of these types of slides with the nibbed soles. Unlike other reviewers, I like the surface and consider it invigorating. I'll admit it may take some getting used to. But, now that I'm used to it, it's fine. The issue I have with these FILA slides is that the nibbed, clear plastic sole that is glued to the base of the sandal came unfastened within a week. I was going to glue it back on, but somehow it was lost. So, here I was with one slide complete and one broken. So, I threw them out. This is not to mention the very strong plastic/chemical smell these came with. I was willing to overlook the smell if they fit and wore well. Then they fell apart.