If you don't wear some kind of shower shoe/flip-flop in the shower and the locker area, carpeted or not, you're putting your health at risk. The HPV is all over the floor and it's easy to get the strain that gives you plantar warts which are very hard to get rid of. I had one and it took six months to get rid of it. Not to mention dudes pissing, spitting, and coming on everything, pretty nasty. I only wear Otomix sneaks when I work out though, great shoe.