The ferraiolo (also ferraiuolo, ferraiolone) is a type of cape traditionally worn by clergy in the Catholic Church on formal, non-liturgical occasions.
[1] It can be worn over the shoulders, or behind them, extends in length to the ankles, is tied in a bow by narrow strips of cloth at the front, and does not have any 'trim' or piping on it.
[1] The colour of the ferraiolo is determined by the rank of the cleric, being black for secular priests, violet for protonotaries apostolic and bishops, and scarlet for cardinals.
[1] Lesser prelates may use faille but should use wool and wear the ferraiolo behind the shoulders.
[1] Pope Paul VI encouraged wearing the ferraiolo at formal, non-liturgical occasions.