i'm not talking about the gambeson or padded armor here, even if those provide some protection and double as good winter cloth, i'm actually talking about second layer armor, the Greek Linothorax.
The linothorax was a cuirass made of 12 to 20 layers of fabric bound together with glue, providing enough protection to survive arrows and swords while being light weight,cooler and cheaper than leather or metal armor.
Elyrian transposition
Every one is going to make some sort of padded armor, either from cotton, silk, linen or other fiber fabric, but only a few should go to linothorax.
The Kypiq are first in mind as wood armor tend to be cumbersome and as they will not have much leather but tons of silk. So Kypiq linothorax should be made out of silk and could come with a bark or leave scaling.
The other ones using the linothorax would be the Waerd, as few armor help keep cool in the hot semi-arid desert as the linothorax and they can team it with a goat wool gambison for cold weather season/time.