I began my life with turned-in feet, not bad enough for plaster, but turned-out special shoes day and night. I'm told I kicked the foot of the crib all night. I have a pair, still. Not sure why, but there they are. Expensive shoes. Toes cut out to extend their life. Then more ordinary shoes, worn on the wrong feet. Hard soles, white leather. Some of my lateral toes never touched ground, and I spent idle moments of childhood pushing them down with my fingers. Worked, too. My toes all touch down.
So, when non-slip crocs were offered at work, gratis, I knew better than to even try. No support. And the ones who opted for them, most of them, are regretting it. Their feet and backs hurt after full days on them. Irony, since they were offered in response to my fall. Oh, well. I'll stick with my solid shoes, arch supports, and the (sort of) non-slip shoe covers. There has been no more waxing of the floors, which we all complained about as it caused general slipperiness in the ORs. I'm still convinced it was lubricant from the elbow door hinges that I slid on. Utterly frictionless, like hitting black ice, and no non-slip material will make any difference.
Oh, and I found this. It has a vibe, I think.