Linothrax Armour

[Johannes II August]

What's exactly a linothrax armour and what materials were used to make it? I presume it's linen armour, by the name, but then I don't know a lot about the subject.

And how widely was linothrax used compared to the bronze hoplite breastplates? How effective it was and what are the weaknesses of this kind of armour?

Thanks