These Columbia sandals are fantastic.  I have three pair of them now.  The purple is actually almost blue; not as bright as the photo and very pretty.  I live in a sub-tropical climate and wear these year-round.  I even wear them as slippers.  They stay on your feet (I've gone white water rafting in them), they're about as supportive as a flip flop can be.  I used to wear cheap flip flops but they're actually really dangerous because you can trip and fall really easily in them.  I'm the mom of four and practically run in these.  Expensive?  Yes.  Worth it?  Absolutely.