Quote Originally Posted by geala
1. I don't think that a "quilted armour" has to consist of two sheets and a filling. "Quilting" (if I get it right in English) is a technique to stabilize different layers of material together. So a gambeson padded with some soft stuff which is fixed by stitching can be quilted, as well as a gambeson consisting of different layers of linen stitched together.
Yeah, well, just to nitpick, but the examples you give still have something that can (and, when you think about it, must) be defined as the "innermost" and "outermost" layers. Whatever's between them is somewhat irrelevant in this regard, although the specifics may affect the item's actual performance as armour considerably.

I'm pretty sure "quilt" normally means a padded garment that has applied stitching above and beyond the seams and similar structural necessities, usually in order to keep the fillings (whatever they now are) in place.