The line dividing daywear and eveningwear began to disappear in the 1960s, as dress codes disintegrated. In 1963, André Courrèges designed pantsuits intended for everyday wear, and Yves Saint Laurent introduced a groundbreaking evening pantsuit in 1966. Based on a man’s tuxedo, Saint Laurent’s smoking broke all barriers of fashionable etiquette and genderspecific dressing. By the 1970s, most fashion rules had been broken.