wow I have a very bad back own all kinds of different sandles brand names ! out of all of them my best pair for the pain in my back and feet are THEM! I even put them on when im in the house for my back! I even have to have the nerves burned in my back from the pain and them shoes are the best ones I have ever wore! I do not know what I would do without them! Its like walking on air with no pain!!!! I tell everyone that! I know the fdc is on them but I can tell you I put in for the refund but if I do not get it I do not care because God how they have and do help my back when im in them which is a lot!!! So thank you for makeing my sandles and tennis shoes! but my brown sandles the most! LOVE THEM !