GANNI Black Oleatex Lace-Up Ballerinas in Leopard. Inspired by 1920s lace-up boots, these Black Oleatex Lace-Up Ballerinas build upon the legacy of our beloved Buckle Ballerina. Presented in a Fabrics of the Future crinkle Oleatex blend, these ballerinas feature signature metal eyelets and crossover wax laces that tie at the front for easy slip-on wear.