Of my hat quest, this is the best so far. Soft drapey merino-silk handspun , teamed with some simple cables makes a really nice beret. The only thing that worries me is that it may be prone to damage as it is so soft and delicate.
The pattern is Relm by Jared Flood (of BrooklynTweed fame) from Knit.1 magazine.
Project ravelled here.