From Vionic, the Chardonnay Leather Dress Sandals feature: Leather upper Decorative covered buckle detail Adjustable hook-and-loop closure to ensure perfect comfort and fit Synthetic lining TPR insole for added cushioning and longevity. Durable synthetic rubber outsole Approx. 2.5" heel height  Imported. Styling Notes: For the greatest comfort, we recommend wearing your new Vionic footwear for just a few hours for the first few days to allow your feet to adjust to the new level of orthotic comfort and support.