ong can often be made like hats (still built up of fabric), which only require the wearer to put on rather than involving any wrapping of hair.
Some will liken Khan Dong to a Turban, though most Khan Dong look more like heavy headbands. There did exist a variation of Khan Dong with much resemblance to the Middle Eastern Turban, worn to some extent in the past, notably by scholars.
The Ao Tu Than has almost disappeared in terms of day to day use for Vietnamese, at least in urban areas. It can still be seen to some extent in rural areas, mainly in the North.
In South Vietnam, the simpler silk pajamas costume Ao Ba Ba is preferred for day to day use.