"In the 21st century it's easy to associate all 1960s fashion with short skirts, but the short skirt was not really worn by many until 1966 and not nationwide until 1967. Just as in the 1920s for half a decade clothes still showed signs of belonging to the late fifties. The fore runner of the mini dress the straight shift, which had developed from the 1957 sack dress, was still well below the knee. In the early sixties, pleated skirts set on a hip yoke basque were worn with short sleeved over blouses which were cut not unlike the shell tops of today. Straight skirts had front and back inverted pleats called kick pleats and were ideal for doing the twist dance craze as they allowed the knee to move freely. Straight sweater dresses in lambswool or the synthetic acrylic variety called Orlon were worn belted with waists nipped in became fashionable."