A suit is considered a necessary part of a man's wardrobe and a mark of his reputation. There are several types of suits including single-breasted suits which can be worn casually with one or two buttons, double-breasted suits which are more formal with two overlapping rows of buttons, lounge suits for daywear, dinner suits for black tie events, business suits for work, and mandarin suits with a Nehru or band collar from Asia. Materials, cuts, and styles have evolved over time but the suit remains a staple of men's formalwear.