From Vionic, the Opal Cow Print Calf Hair Mules feature: Cow print calf hair upper Slip on styling Synthetic lining Built-in VIO MOTION Technology footbed featuring contoured arch support, and a deep heel cup to provide stability & forefoot flexibility Lightweight, flexible EVA midsole helps reduce stress on feet, ankles and knees Durable TPU outsole Approx. 0.75" platform height Approx. 1.125" heel height It's recommended to wear your new pair for a few hours to allow your feet to adapt to the new support Imported.