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 concelebrating 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