If you suffer from plantar faciitis, these are the flip flops you need!  I have tried at least a dozen different brands/styles, and these by FAR have the best support.  The Orthaheel by Vionic is fantastic, and does everything it promises.  I thought flip flops were going to be complete off limits -- was very sad about that.  UNTIL I found these.  They do need a little getting used to, because the arch is very full...an hour or so at a time for the first few days helps with the adjustment.  The arch and heel support is fantastic and helps alleviate my PF pain.