If you are not used to Birkenstock's, the toe support part can be a little weird at first.  But, once you get used to them after a few wears you will never want to wear a pair of regular flip flop/sandals again!  You can go all day in these and your feet feel great.  They are more supportive than most shoes.  Also, the way all Birkenstock soles kind of curve up around your foot makes them a little more protective than regular flip flops.