Uma Wang Ballet Strap Ballerinas are leather ballet flats defined by an elastic cross strap that secures the foot for easy everyday wear. Key attributes: Black | Calf leather | Elastic cross strap | Ballet silhouette | Dimensions & fit: Fits true to size | Composition & care: 100% calf leather | Avoid prolonged exposure to water or heat. Wipe clean with a soft, damp cloth; use leather conditioner as needed. Do not machine wash.