Mekong Blue is a social enterprise and weaving workshop in Stung Treng that trains vulnerable women in traditional Cambodian silk weaving. The workshop is open to visitors and you can watch the entire process — from dyeing the silk threads to the finished cloth on the loom — while chatting (through a guide) with the weavers. The finished scarves and sarongs are beautiful and among the most distinctive souvenirs available in Cambodia.
The quality is substantially better than most tourist-market silk goods, and buying here directly supports the women who make the cloth. The workshop is in town, a short tuk-tuk ride from the riverfront.