Bordeaux/brown leather CASATI D'Orsay ballerina shoes from NICHOLAS KIRKWOOD featuring d'Orsay design, pearl detailing, two-tone design, slip-on style and low block heel. POSITIVELY CONSCIOUS: This Planet Conscious product is crafted with leather that has been produced in an audited and certified Leather Working Group (LWG) tannery — scored according to a three-tier system. The LWG assesses and certifies leather manufacturers that reduce the environmental impact of production..