A surplice is a loose-fitting, white, knee-length garment with wide sleeves. It is usually made of lightweight cotton or linen and is worn over a cassock or other liturgical garment during liturgical services such as Mass. The surplice is a symbol of purity and holiness and represents the baptismal garment that all Christians receive when they are baptized. It is often worn by members of the clergy, such as priests and deacons, during services involving the administration of sacraments such as baptism and Holy Communion.