The Kirra combines a triangular thong leather upper with subtle perforated design and buckle detail. A back strap adds stability and adjustability. The footbed is microfiber wrapped EVA that absorbs shock, reducing stress on feet, ankles and knees. Durable rubber outsole with a patterned tread provides traction on a variety of surfaces. Orthaheel Technology is biomechanically designed to hug your arches and support your feet in comfort. Vionic sandals’ built-in orthotic is shown to be effective in helping to treat heel pain (plantar fasciitis). Recommended by Dr. Andrew Weil.