The Linen Karballatu
Some years ago, I made up one of the famous Persian hoods in red linen cloth. I machine-sewed it and bag-lined it, and did not have sources other than reliefs, the Darius Mosaic, the bonnet from one of the Pazyryk tombs, and an interesting woodcut which Jona Lendering showed me. I used linen because it was available and appropriately light and flowing. I had a feeling that wool would have been more common. Back then, I knew that Strabo said that ordinary Persians wore a rag of sindōn (fine linen? by the middle ages sindon was a delicate silk) about their heads while rich ones wore a tower-like felt hat, so I had one possible source for linen (the original Greek is ῥάκος σινδόνιόν and πίλημα πυργωτόν and the citation is Strabo, Geography, 15.3.19). In the meantime I learned a bit of Greek, and also some Akkadian. It turned out that both of those languages are relevant.