i am a registered nurse, and am on my feet alot!  this is the only shoe i have tried that has actually worked.  i have tried all the expensive shoes that are recommended for rns but they all left my feet, knees and legs aching and sore.  these pains were becoming chronic, until i tried the fit flops.  all the pains have gone.  they are like miracle shoes.  i highly recommend them to both young and old.