From Vionic, the Maia Leather Knot Dress Sandals feature: Leather upper with knot detail Adjustable buckle ankle strap closure Received the APMA Seal of Acceptance Synthetic lining EVA cushioned insole Built-in VIO MOTION technology footbed with arch support, shock-absorbing cushioning and deep heel cup for stability Synthetic outsole Approx. 2.5" heel height Imported.