Deciding how to pleat a kilt

[User]

On their Sustainability page, they state:

As standard we apply a fluorocarbon finish to every Polyester-Viscose fabric ...

https://martonmills.com/sustainability

And on their "About Us" page, they state:

Finished to Perfection
Through our partnership with Roberts Dyers and Finishers, we apply specialist finishes — from Teflon® to Nanosphere® — to meet your end use.

https://martonmills.com/about

I interpret that as meaning their PV is always treated, but these days their wool is treated by request. Some of the language on their sustainability page sounds like the market is shifting away from forever chemicals and toward natural, so perhaps those treatments on wool create mixed feelings among consumers.

Polyester is already synthetic, and viscose is semi-synthetic, so I suppose there's less objection. Also, their PV line is primarily purchased for school wear, so stain resistance is likely considered a necessity.

Then again, I'm just speculating based on the official information available. If someone wants a definitive answer, I suppose it would be best to ask them directly for clarification.