From Vionic, the Tide Leather Thong Sandals feature: Premium leather and fabric upper Slip on with soft woven toe post Built-in VIO MOTION Technology footbed featuring contoured arch support, with shock-absorbing cushioning, and a deep heel cup to provide stability & forefoot flexibility  Lightweight, flexible EVA midsole helps reduce stress on feet, ankles and knees Durable TPR outsole with patterned tread helps improve traction Received the APMA  Seal of Acceptance Approx. 0.75" platform height Approx. 1.35" 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.