From Vionic, the Brea Leather Thong Sandals feature: Leather upper Slip on styling with back strap Built-in VIO MOTION technology footbed with contoured arch support Synthetic microfiber lining Lightweight, flexible EVA midsole Durable rubber outsole Approx. 0.625" platform Approx. 1.5" heel APMA accepted Imported. Styling Notes: It's recommended to wear your new pair for a few hours to allow your feet to adapt to the new support