Vietnam 2006 Ao dai clothing. In its current form, it is a tightfitting silk tunic worn over pants. Ao classifies the item as a piece of clothing on the upper part of the body, and dai means "long".
The annual APEC Economic Leaders' Meeting is renowned for a group photo of the attending prominent figures, who often don characteristic attire provided by the host country. Here is a selection of what was worn in previous years.