From Vionic, the Haven RX Platform Recovery Slide Sandals feature: Breathable stretch knit fabric upper Received the APMA Seal of Acceptance Slip on styling VIO MOTION Technology footbed with contoured arch support Deep heel cup provides stability Lightweight, dual-density midsole for optimal comfort Durable synthetic outsole Approx. 1" platform Approx. 1.375" heel height Imported. Styling Notes: It is recommended you wear your new pair for a few hours to let your feet adapt to the new support.