From Vionic, the Petaluma Leather Slingback Flats feature: Leather fabric upper with 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 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.