Ok, I have a canidate:

PBI TurtleSkin USAR S/R Pants

Mfg PBI blurb

About Turtleskin

I have some gloves with this stuff and I suspect it indeed would be super tough while still being light and breathable (if not coated). Unlike most sythetics, it is fire resistant.

I wonder if anyone has gandered at these clothes. Maybe some of our firefighting folks?

Thanks,

-john