I live in Florida where shoes are only used if you are working.  I have very bad plantar fasciitis and my foot doc told me it was not getting better because of my use of flip flops.  He suggested this brand of foot wear because they have built in support so the arch is neutral and the plantar tendon gets a break because you don't need to "pinch" toes to keep flip flop on.  My foot pain is almost completely gone after a few months of wearing this brand of shoes at home!