Market Day is the only day that men also wear the traditional clothing, which is also indigo-dyed, but for mens' clothes the fabric is rubbed to give it a satiny sheen. You can see this on the boy in the front center with his back to the camera. I think what's happening in the foreground is that these women are demonstrating the quality of their hemp twine for a potential buyer, right.
Viet Nam. June 2009.