The Anglican form is a descendant of traditional albs worn by deacons and priests, but with sleeves gathered at the wrists, and nearly as long as the underlying cassock.
[2] In the Catholic Church, cardinals, bishops and certain other dignitaries use a rochet, a garment that is worn over the cassock for non-Eucharistic functions, or Masses at which the wearer is not a celebrant.
The Catholic rochet is a tunic of white, usually fine linen or muslin (batiste, mull) reaching about to the knee, and distinguished from the surplice mainly by the narrower sleeves which make its arms tight-fitting.
The lower edge and the sleeves may also be garnished with lace, lined with violet or red silk (in the case of prelates), or, more rarely, embroidered borders.
At the beginning of the 12th century, the rochet is mentioned under the name of camisia, by Gilbert of Limerick and by Honorius, and, somewhat later, by Gerloh of Reichersperg as tunica talaris.
It may be worn with a stole, cope and mitre for more dignified occasions (such as Baptism outside the context of the Eucharist, Solemn Evensong, royal weddings and the coronation of the Sovereign).
In general it has retained the medieval form more closely than the Roman rochet and more resembles the alb, insofar as it is of plain, very fine linen, and reaches almost to the feet.
The portrait of Archbishop Warham at Lambeth, for instance, shows a rochet with fairly wide sleeves narrowing towards the wrists, where they are confined by fur cuffs.
The ribbon by which the wrist is confined is red, except when conducting or participating in a formal, public funeral (e.g. of a head of state), when it is black.