This ergonomic take on the essential flip-flop is podiatrist-designed with a built-in orthotic footbed to support and realign your foot The biomechanical Tri-Planar Motion Control footbed with a deep heel cup helps stabilize support and realign the feet back to their natural position Lightweight flexible EVA midsole absorbs shock to reduce foot stress Durable TPR outsole with patterned tread helps improve traction Recommended by Dr Andrew Weil American Podiatric Medical Association Seal of Acceptance Leather and textile upper/synthetic lining/rubber sole By Vionic imported Womens Shoes Item #956287 Helpful info Shoe Fit Fundamentals video