Transitional deacon followed by Latin Catholic priest
The vestments most particularly associated with the Western Rite Catholic deacon are the alb, stole and dalmatic. Deacons, like priests and bishops, must wear their albs and stoles; deacons place the stole over their left shoulder and it hangs across to their right side, while priests and bishops wear it around their necks. The dalmatic, a vestment especially associated with the deacon, is worn during the celebration of the mass and other liturgical functions; its use is more liberally applied than the corresponding vestment of the priest, the chasuble. At certain major celebrations, such as ordinations, the diocesan bishop wears a dalmatic under his chasuble, to signify that he enjoys the fullness of the three degrees of holy orders—deacon, priest, and bishop.The  diaconate is conferred on seminarians continuing to the priesthood no sooner than 23 years of age (canon 1031 of the Code of Canon Law). As a permanent state, the diaconate can be conferred on single men 25 or older, and on married men 35 or older, but an older age can be required by the episcopal conference. If a married deacon is widowed, he must maintain the celibate state. Under some very rare circumstances, however, deacons who have been widowed can receive permission to remarry. This is most commonly done when the deacon is left as a single father. In some cases, a widowed deacon will seek priestly ordination, especially if his children are grown.A deacon is not styled "Father" as a priest would be, but as "Deacon", abbreviated variously as "Dn." or "Dcn." This preferred method of address is stated in the 2005 document of the United States Conference of Catholic Bishops, "National Directory for the Formation, Ministry and Life of Permanent Deacons in the United States". 
The proper address in written correspondence for all deacons of the Latin Church in the United States is "Deacon Name", although it is not uncommon to see "Rev. Mr." sometimes used. "Rev. Mr.", however, is more often used to indicate a transitional deacon (i.e., preparing for ordination to the priesthood) or one who belongs to a religious institute, while Rev. Deacon is used as the honorific for permanent deacons in many dioceses (e.g., Rev. Deacon John Smith, or Deacon John Smith). The decision as to whether deacons wear the Roman collar as street attire is left to the discretion of each bishop for his own diocese. Where clerical garb is approved by the bishop, the deacon can choose to wear or not wear the "collar".Deacons, like seminarians, religious, and the two other orders, bishops and priests, pray the Liturgy of the Hours; however, deacons are usually only required to pray morning and evening prayer.