The tuxeo is a man's dress suit of clothes in the semi-formal, black tie evening dress convention. A traditional tuxedo jacket is woolen and single-breasted. The jacket has peaked, shawl, notch, or trick lapels (which includes Mandarin and other non-conventional styles), traditionally covered with satin, and more modern styles are trimmed in grosgrain or wool. The buttons should be satin-covered. Trousers should be in the same wool as the jacket, with the side seams decorated in an inch-wide satin ribbon matching the lapel. The shirt is white with linked cuffs. The shirt may be pleated with a turn-down collar and French or barrel cuffs, or have a pique bib front with either a turn-down collar and French cuffs or a wing collar and barrel cuffs. Tradition dictates a black bow tie complementing the lapels, cummerbund or low-cut 3-button waistcoat, and patent leather Oxford shoes appropriately accessorize the tuxedo. More contemporary fashions often feature a full 5 or 6 button vest matching the color of one's partner's dress, with a matching bow tie or four-in-hand-knotted tie of the same color.