The following article was sourced from a Wikipedia page at the following address: http://en.wikipedia.org/wiki/Choir_dress
Choir dress is the traditional vesture of the clerics, seminarians and religious of Christian churches worn for public prayer and the administration of the sacraments except when celebrating or co-celebrating the Eucharist. It differs from the vestments worn by the celebrants of the Eucharist, being normally made of fabrics such as wool, cotton or silk, as opposed to the fine brocades used in vestments. It may also be worn by lay assistants such as acolytes and choirs. It was abandoned by most of the Churches which originated in the sixteenth-century Reformation
Like eucharistic vestments it derived originally from the formal secular dress of the Roman Empire in the first centuries of the Christian era which survived in church usage after fashion had changed.
Choir dress also differs from "house dress" which is worn outside of a liturgical context (whether in the house or on the street). House dress may be either formal or informal.
ROMAN CATHOLIC CHOIR DRESS
Choir dress in the Catholic Church is worn by deacons, priests and bishops when presiding at or celebrating a liturgy that is not the Mass, especially the Liturgy of the Hours, or when attending Mass without celebrating or concelebrating the Eucharist. It is worn by seminarians, instituted lectors and acolytes, and altar servers and choir members at Mass or other liturgical events.
The basic components of choir dress are:
For seminarians, deacons, and priests the cassock is exactly the same as their normal cassock: a black cassock with black buttons, girded with a black fascia.
Priests who hold additional honours may wear a different cassock: Chaplains of His Holiness wear a black cassock with purple piping, buttons, and fascia, while Honorary Prelates and Protonotaries apostolic wear a purple cassock with scarlet piping and buttons with a purple fascia. A black cassock with amaranth piping and buttons, girded with a purple fascia, serves as pian dress (academic dress) for an honorary prelate or protonotary apostolic. Canons may wear the rochet (if the chapter has been granted usus rochetti by papal indult) with a distinctive mozzetta, the particular colours of which are determined by the chapter.
Bishops wear the above-mentioned purple cassock with scarlet piping, and add a pectoral cross suspended from a green and gold cord, a mozzetta over the rochet, and a purple zucchetto under the biretta. A cardinal wears a scarlet cassock with scarlet trim, pectoral cross on a red and gold cord and a red mozzetta over the rochet, with a red zucchetto. The Pope's choir dress includes a white cassock, rochet, red silk mozetta, red brocade stole and his pectoral cross hangs from a golden cord. Some canons wear their cross on a ribbon, but only a bishop may wear the cross on a cord. Under new regulations, neither bishops nor canons wear fur trimmed cappas.
The cope and/or stole may be worn over choir dress when a cleric presides over a sacrament (for instance, at matrimony, if not celebrated during Mass), or by the cleric presiding over prayers (for instance, the priest presiding at a solemn celebration of Vespers in the Liturgy of the Hours at a seminary might wear cope and stole over choir dress, while the priests of the faculty and seminarians would wear simple choir dress of cassock and surplice).
Monks who are neither deacons nor priests also have a form of choir dress: the full monastic habit with the monastic cowl forms their formal wear for attending the Liturgy of the Hours or Mass.
EASTERN CHOIR DRESS
The choir dress of clergy in the Eastern Orthodox, Oriental Orthodox and Eastern Catholic churches are relatively similar. Over the inner cassock (rasson or podrasnik), a deep-sleeved exorason (riassa), which is often black, is worn. In the Russian Orthodox Church, married clergy often wear grey, while monastic clergy wear black. During the paschal season both monastic and married clergy will often wear a white inner cassock. Some Russian Metropolitans wear a white inner cassock and a blue outer when formally arriving to celebrate the Divine Liturgy.
Monastic clergy wear different headcoverings than married clergy. Married clergy wear either a colored kalimaukion or skufia; monastic clergy wear a black kalimaukion and veil (together known as the klobuk). For monastics, the skufia is reserved for house dress, and the klobuk is worn in church. Russian archbishops have a jewelled cross attached to the front of their klobuks; Russian Metropolitans wear a white klobuk with jewelled cross. Several Orthodox Patriarchs wear a rounded headcovering called a koukoulion.
Priests who have been awarded a pectoral cross wear it with their choir dress (these pectoral crosses are of several degrees: silver, gold, or jewelled). Bishops wear a panagia (icon of the Theotokos) in place of the pectoral cross. Archbishops may wear a pectoral cross and a panagia. All primates and some bishops below primatial rank have the dignity of wearing an enkolpion (icon of Christ), a pectoral cross, and a panagia.
A ruling Igumen (so long as he is inside his own monastery) and a bishop may carry his paterissa (crozier) when he is in church. However, the paterissa is never to be carried inside the sanctuary; instead, when he goes into the altar, the paterissa is either handed to an altar server or left leaning against the iconostasis outside the Holy Doors.
In North America and Great Britain, some Orthodox clergy have begun to wear a Roman collar (clergy shirt), though this is discouraged among the more traditional Orthodox.
In the Syriac Orthodox Church, married priests wear a black skullcap, or phiro, while monastic priests wear the schema, eskimo. For certain sacramental functions, a priest or bishop puts on the epitrachelion (stole).
Choir dress in Anglicanism traditionally consists of cassock, surplice and scarf (or tippet). An academic hood may also be worn and, since 1964 in the Church of England a cope may be worn at the discretion of the minister. However, the basic garment was, and is, the surplice which by the fourteenth century had become the essential choir-vestment everywhere. The surplice was the only vesture permitted to the clergy in the 1552 Prayer Book, except for bishops who should use a rochet (both wore cassocks as the standard undergarment). The Elizabethan Prayer Book of 1559 included the so-called Ornaments Rubric. Its legal interpretation was disputed in the nineteenth century it was claimed that its inclusion in the 1662 Book of Common Prayer commanded the pre-Reformation eucharistic vestments (chasuble, dalmatic, tunicle, alb, amice, and maniple) that had been in use during the reign of Edward VI. However, the Elizabethan bishops struggled to enforce the use of the surplice, and the use of eucharistic vestments was discontinued until after the Oxford Movement, in the middle of the nineteenth century, when it was restored in many cathedrals and parish churches. In many low-church dioceses and parishes the choir dress continued to be the norm, even at the Eucharist. The cope nevertheless continued in use for coronations and in certain cathedrals, but this may be considered an extension of "choir dress" and was sanctioned by the canons of 1603/4.
The cassock is almost invariably black for priests and deacons. A traditional Anglican cassock is double-breasted, being buttoned on the shoulder rather than up the front (there may be a single button sewn to the centre of the chest used to fasten the academic hood if worn). Many Anglican clergy, especially (though not exclusively) those within the catholic tradition of Anglicanism, prefer to wear the Latin single-breasted cassock. The cassock is worn with a cincture, which may take the form of a cloth sash resembling a fascia, or a simple rope girdle or leather belt. Over this is worn the surplice, which is longer and fuller than that worn by Roman Catholic clergy, sometimes reaching well below the knees. Traditionally, an academic hood is worn around the shoulders and down the back, along with a black tippet or scarf worn around the nape and hanging straight down in front. The hood and tippet were once a single garment called an almuce. (The tippet is not to be confused with the stole, which is also worn in a similar manner, but is not part of choir dress, being worn at the Eucharist and other sacramental services.) Some clergy also wear Geneva bands (or "preaching tabs") from their collars. At solemn Mattins or Evensong, the minister may wear the cope over the surplice, rather than tippet and hood. During some periods of history a black gown, either academic or 'Genevan', was worn for Morning and Evening Prayer instead of the surplice, which was reserved for use at the Holy Communion - the cassock, bands, gown, academic hood, and tippet still being the normal liturgical costume for ordained minister of the Church of Scotland and other Reformed and Presbyterian churches.
Chaplains in the Armed Forces wear tippets with officially sanctioned badges and any medals they have achieved. A bishop or priest may wear a tippet with the arms of the seminary from which he received his degree. In England some cathedral clergy wear tippets on which is embroidered the distinctive symbol or cathedral coat of arms. Members of the high church or Anglo-Catholic parts of the church sometimes wear choir dress of a more Roman Catholic style, including a shorter surplice (or cotta), a stole (and sometimes a biretta), excluding hood and tippet.
Readers when officiating often wear a blue tippet, or, in the United States, a black tippet displaying the arms of the diocese.
Anglican bishops usually wear a purple cassock. Over this, instead of the surplice, they wear the rochet with red or black chimere and matching cuffs, black tippet, and sometimes an academic hood.
To read more about choir dress, please click on the following link: http://en.wikipedia.org/wiki/Choir_dress