What are the names of the vestments that a deacon wears at Mass?
A deacon wears over his "street clothes" an alb - the white garment. This is the garment of the baptized. A stole is worn cross the shoulder as a symbol of ordination into the order of deacon and of the role of service. Also a dalmatic is worn, in some parishes, where a more"formal" look is required. This is worn over the stole - again - symbolizing the deacon and his role of service, especially in the eucharist as a minister of the gospel, perhaps preaching, and of support to the priest during the preparation of the gifts and giving communion, specifically the cup.