A suit is considered a necessary part of a man's wardrobe and formal attire. There are several types of suits including single-breasted, double-breasted, lounge suits, dinner suits, business suits, mandarin suits, wedding suits, and tuxedos. Double-breasted suits have two columns of buttons that overlap, with one column being decorative and the other functional. Double-breasted suits were popular in the 1930s-1950s and again in the 1980s-1990s, though they are now less common except in high-end menswear lines.