Vionic Caroll 20 Women's Flats Black LeatherPowered by Vio Motion Technology to balance the whole you. The Caroll 2. 0 gets a modern update. With its elastic topline detail, zig zag stitching, and back pull tab, this ballet flat blends everyday ease with contemporary style. A soft deconstructed upper and new slimmer toe shape create a refined look, while flexible construction moves with you all day. These Vionic Caroll 2. 0 Black Leather women's flats have the following features: Upper: Leather