chlamys

150px|thumb|Hermes wearing a chlamys. Painting attributed to the [[Tithonos Painter, .]]

The chlamys (; genitive: ) was a type of ancient Greek cloak. It was worn by men for military and hunting purposes during the Classical, Hellenistic and later periods. By the time of the Byzantine Empire it was part of the state costume of the emperor and high officials. It survived as such until at least the 12th century.