Vionic active footwear features Advanced Motion System (AMS) technology, combining podiatrist-designed orthotic with a flexible, cushioned outsole and a lightweight, breathable upper. Features Vionic's premium removable biomechanical orthotic footbed - mesh covered. Dual-layer breathable mesh upper. The incorporated Orthaheel Technology and Orthotic Arch Support is clinically shown to help relieve common causes of heel pain or plantar fasciitis, and knee pain related to over pronation and flat feet.