I've had these flop flops for about a week.  I use them as house slippers.  They provide excellent support in the arches and with the all so important heel cups!  Consequently, I have no difficulty keeping these sandals on my flat feet!  Too many flip flops on the market are made as FLAT as the floor, and offer absolutely no support to the foot if you lack arches.  I will advise all of my friends to try DAWS flip flops if they haven't already.  And the price - you cannot beat it!!!