A cassock-alb is a vestment that combines features of the cassock and alb. The typical robes of a verger are a black gown worn over a black cassock. Anglican bishops usually wear a purple cassock. Priests wearing the traditional Kammees and white cassock. The pope customarily wears a white zucchetto to match his white cassock. Over his cassock the Pope will wear a lace rochet. However, most Clergy, includingAnglo-Catholic Clergy, choose the single breasted cassock. This generally consists of a clerical collar, clergy shirt, and (on certain occasions) a cassock. The variant of the clergy cassock may be cut as a vest. It is also common for Methodist acolytes to wear the traditional cassock and cotta. The Cassock is also worn occasionally in American Lutheran churches. This is worn with a cassock, cincture and scarf. A cassock is worn in more formal situations. Jesuits in tropical countries may use a white cassock. In this sense, the apparel was much more practical than a clerical cassock would be.