ABEO B.I.O.system® Balboa Post is perfect for low arches and flat feet, a posted heel footbed provides the support and stability. These sandals offer extra support for the inside of the foot, controlling over-pronation and offering awesome comfort. I got these sandals in Hawaii for $89 in size 5. Ideal , a posted heel footbed provides the ultimate support and stability. They are also water resistant, the rubber outsold absorbs shock and channels water for improved traction. No slipping and sliding with these sandals. Talk about great support of which I have never had before in a sandal. No more sore feet.