On our standard Microwobbleboard midsole Average fit APMA* Seal of Acceptance, for footwear found to promote good foot health Leather-lined Biomechanically engineered, comfortable sandals Embellished with swings of iridescent tubular beads Built-in arch contour We engineer every pair of Fit Flop sandals with our amazing, multi-density midsoles. They're ergonomic, cush, pressure-diffusing & totally 'wunderbar' if you're going to walk a lot! * American Podiatric Medical Association