Canvas interfacing

[Andrew Breecher]

One of the chest canvases would actually work better. You want to add strength but not weight. The idea of using hair Canvas in the back of a kilt is to give some vertical stiffness and body to the kilt.
It forms something along the same idea as boning. This is why we fold the Hair canvas. Each added layer adds to the vertical rigidity.
The Hair Canvas we want for a kilt is stiffer in one direction that in the other and it is dimensionally stable. It does not "give".

Thank you, Steve. I wondered about that. Chest canvas (or "hair cloth" in the tailoring trade) is made with long strands of horse hair and does react just as you describe. It is much stiffer in one direction than body canvas.