Petasos

A petasos (Greek: πέτασος) or petasus (Latin) is a broad brimmed hat of Thessalian origin worn by ancient Greeks, Thracians and Etruscans, often in combination with the chlamys cape. It was made of wool felt, leather, straw or animal skin. Women's versions had a high crown while those for men featured a lower crown. It was worn primarily by farmers, travellers and hunters, and was considered characteristic of rural people. As a winged hat, it became the symbol of Hermes, the Greek mythological messenger god.

Along with the pileus, the petasos was the most common hat worn in Ancient Greece. Its wide brim protected the wearer from the sun and rain while a lengthy strap allowed wearers to secure it under the chin. Its popularity later extended to the Etruscans, the Byzantine Empire and the Roman Empire, in slightly modified forms.

A type of metal helmet worn by Athenian cavalry was made in the shape of a petasos. Some examples have holes around the outer edge of the brim, presumably so a fabric cover could be attached. These are known from reliefs and vase paintings, with at least one archaeological example found in an Athenian tomb.