Twin goring is featured on the vamp for all-day wearability. Firm yet flexible, removable microfiber-covered EVA orthotic insert. Rubber outsole with patterned tread for improved traction. Features Orthaheel Technology, a biomechanic orthotic footbed that naturally aligns your feet and may help to relieve heel pain by reducing over-pronation. Recommended by Dr. Andrew Weil. APMA Seal of Acceptance.