Jil Sander Suede Perforated Ballet FlatsJil Sander perforated suede ballet flats, made of suede leather with perforated work on the pointed upper. The upper structure features regular holes that highlight the material and tapered silhouette. A removable metal ankle strap adds a functional element and allows for multiple modes of wear. The construction includes a nappa leather insole, while the sole is made of calfskin leather.