the most popular style of ao dai fits tightly around the wearer's upper torso, emphasizing her bust and curves. although the dress covers the entire body, it is thought to be provocative, especially when it is made of thin fabric. "the ao dai covers everything, but hides nothing", according to one saying. the dress must be individually fitted and usually requires several weeks for a tailor to complete. an ao dai costs about $200 in the united states and about $40 in vietnam.