Semi-formal wear

semi-formal Western dress code for evening events, originating in British and North American conventions for attire in the 19th century

hard, round-crowned hat with a narrow rolled brim

__NOTOC__ thumb|Straw boater thumb|right|Athlete and manager Connie Mack sporting a boater in 1911

soft felt hat with the crown dented lengthwise and a slightly rolled brim

thumb|250px|Black tie cummerbund

men's semiformal daytime attire

short leather boots

woman's tuxedo suit, introduced by Yves Saint Laurent

formal evening dress worn by military officers in the mess or at other formal occasions

subset of clothing

formal or semi-formal, open-front, waist-length dress jacket of military origin