Three Canadian officers in mess dress or mess kit. Miniature medals and other accoutrements are also worn.

Mess dress is the military term for the formal evening dress worn in the mess or at other formal occasions. It is also known as mess uniform and mess kit in some places. (However, Mess kit in the United States, and some other countries, means a compact kit of cooking and eating utensils for use by soldiers and campers. Also known as mess tins and mess gear.)

Mess dress would be worn at occasions requiring white tie or black tie as the dress.