This is my fifth pair of Fitflops.  Once you have a pair; you will want more.  I live in them during the summer.  I even wore my suede ones some this winter indoors.  I don't know if the claims to give your legs a workout are true, but they are the most comfortable shoes you will ever wear.  A word of caution - go down a size.  The first pair I bought were a 9 (which I wear in most shoes) but they were too big.  Now the 8's work great!  Don't be afraid about them being between your toes, they are no problem.  I am a big fan of Fitflops.  I have black, silver, beige suede, pink, and flamingo.  The flamingo is beautiful!