the "áo ngũ thân" had two flaps sewn together in the back, two flaps sewn together in the front, and a "baby flap" hidden underneath the main front flap. the gown appeared to have two-flaps with slits on both sides, features preserved in the later ao dai. compared to a modern ao dai, the front and back flaps were much broader and the fit looser and much shorter. it had a high collar and was buttoned in the same fashion as a modern ao dai. women could wear the dress with the top few buttons undone, revealing a glimpse of their "yếm" underneath.