From Vionic, the Petaluma Suede Slingback Flats feature: Suede upper with leather cap toe Slip on sling back styling Adjustable buckle closure Modern square toe VIO MOTION technology footbed Synthetic lining Durable rubber outsole  Approx. 0.75" heel height It is recommended to wear your new pair for a few hours to allow your feet to adapt to the new support.  Imported.