From Vionic, the Indigo Nylon Thong Sandals feature: Striped nylon fabric upper Slip on with soft woven toe post Built-in VIO MOTION Technology footbed featuring contoured arch support, and a deep heel cup to provide stability & forefoot flexibility  Lightweight, flexible dual-density midsole helps reduce stress on feet, ankles and knees Durable rubber outsole Approx. 0.75" platform height Approx. 1.375" 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.