What is "sticharion"

n. The outer clerical garb worn by clergy in the Greek Orthodox Church, corresponding to the alb in catholic churches.

The sticharion (also stikharion or stichar; Greek: στιχάριον; Slavonic: стихарь) is a liturgical vestment of the Eastern Orthodox and Eastern Catholic Churches, roughly analogous in function to the alb of the Western Church. The sticharion is worn by all classes of ordained ministers in the Constantinopolitan Rite and comes in two forms: one worn by priests and one worn by deacon and other altar servers.

The sticharion is derived from the chiton, a long, sleeved garment which reached to the ground and was worn in ancient times by both men and women.