From Vionic, the Willa 2.0 Perforated Suede Slip On Loafers feature:  Premium perforated suede upper Received the APMA Seal of Acceptance Slip on styling Synthetic lining 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.