From Vionic, the Bella II Cork Bow Detail Flip Flops feature: cork upper bow detail synthetic lining lightweight, flexible EVA midsole that absorbs shock to reduce pressure on feet, ankles and knees podiatrist-designed biomechanical orthotic footbed with deep heel cup that helps support and realign the feet back to their natural position Recommended by Dr. Andrew Weil Received APMA Seal of Acceptance microfiber-covered EVA outsole with wave-patterned tread for traction on a variety of surfaces clinically shown to help relieve common causes of plantar fasciitis, heel pain and knee pain, related to over pronation and flat feet approx. 1" heel It is recommended to wear your new pair for a few hours to allow your feet to adapt to the new support. Imported.