Black leather Niki Nails sandals from Ancient Greek Sandals featuring micro gold-tone Rockstuds, a slip-on style, an open toe, a branded insole and a flat sole. POSITIVELY CONSCIOUS: Ancient Greek Sandals scores 3 out 5 by independent ethical brand rating agency Good On You. It manufactures locally to reduce its carbon footprint, uses low impact non-toxic dyes and visits suppliers regularly in its supply chain..