Gambesons in roman times?

[Draugr the Greedy]

Claiming that all textile armour would have been quilted is a bold claim, and I don't necessarily agree with that. Some of the early middle age European sources can just as easily be interpreted as unquilted textile armour.

All you have to do is produce a single extant example that isn't quilted. There are dozens to choose from.

Extant finds are not the only sources and if we only kept to extant finds we'd have very little to show for in terms of knowledge about armour. Artistic depictions and written mentions serve as well, and there's written mentions of textile armour in the early middle ages that can easily be interpreted as being unquilted.