Oak bast cloth?

 I was aware that the Ainu made cloth from bark, not from bark per se as in Tapa cloth, but what they actually did was use the inner bark to make thread which they wove into clothing.

but on googling for more information on bark bast clothing, I found it was related to linen, ramie etc. But then I ran into an article nothing that a small cloth found in the ancient ruins of Gobliepi tepe was made from Oak bast/bark.

Full article at Ancient Origins site.