From Vionic, the Carissa Suede Buckle Hardware Lugged Booties feature: Premium suede upper Received  the APMA seal of acceptance Inside zipper closure Synthetic lining Accented with dual side buckle detail Built-in VIO MOTION Technology footbed featuring contoured arch support and a deep heel cup Lightweight, flexible EVA midsole Durable synthetic lugged outsole Approx. 5.5" boot shaft height Approx. 10.6" boot shaft circumference Approx. 0.75" platform height Approx. 1.375" wedge height Imported. Styling Notes: It is recommended to wear you new pair for a few hours to allow your feet to adapt to the new support.