Iron-grey calf leather studded leather belt from ZADIG&VOLTAIRE featuring silver-tone logo plaque, silver-tone stud detailing, silver-tone buckle fastening and adjustable fit. 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..