These were recommended by my doctor, because I have plantar faciitis. They arrived, and they had been worn. I also am not sure they are legitimate, because they look like a cheap shoe, and they cost over $80. That's quite a bit for a flip flop. They are very uncomfortable as well, provide little arch support, and the plastic band that separates the toes is extremely uncomfortable. There was no packing slip or return address on the box, so I couldn't return.