Liula 60mm thong-strap mules from SANDRO featuring thong strap, black, calf leather, slip-on style, branded insole and mid-heel. This item is crafted with leather that has been produced in a certified Leather Working Group (LWG) or ICEC tannery, ensuring the production process has a reduced environmental impact.. Learn more about what makes a product Conscious on our Conscious Criteria page.