‘Black Tie Optional’ or ‘preferred
Both of these options mean you have a choice of either a tuxedo or a suit. But what is the difference, exactly?
The biggest difference between a tuxedo and a suit is the satin detailing. Tuxedoes have satin detailing along the lapels of the suit and often of the trousers. Suits are completely made out of the same material.
This dress code that requires men to wear a dinner jacket with matching trousers, a pleated white shirt, black formal shoes, and a bow tie. Optionally, men can also wear a cummerbund or a waistcoat.