Vionic Women's Rest Kirra Backstrap Sandal Perforated Suede Periwinkle Your favorite wear-everywhere sandal! The Kirra combines a triangular thong leather upper with subtle metal rivets and buckle detail, plus a backstrap that adds stability and adjustability. Other Product Features Suede upper; 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 Footbed: microfiber wrapped EVA absorbs shock, reducing stress on feet, ankles and knees Vionic sandals' built-in orthotic is shown to be effective in helping to treat heel pain (plantar fasciitis) Backstrap design