From Vionic, the Willa 2.0 Leather Slip-On Loafers feature:  Leather upper Received the American Podiatric Medical Association Seal of Acceptance Slip on construction Synthetic lining Built-in VIO MOTION Technology footbed with contoured arch support Deep heel cup provides stability Flexible, cushioned rubber outsole Approx. 0.5" heel height  Imported. Styling Notes: It is recommended to wear your new pair for a few hours to allow your feet to adapt to the new support.