Vionic Kirra Sandals Metallic Bronze Thongs Orthopedic Flats Slingback, size 7.5 - Lightweight, flexible EVA midsole absorbs shock, reducing stress on feet, ankles, and knees. - Durable rubber outsole with a patterned tread provides traction on a variety of surfaces. - Vionic 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). - Received APMA Seal of Acceptance Great preloved condition.