Denim.

I love working with Denim.
Especially good quality heavy weight rigid Denim.
It cuts well. It sews well.
It always does what it's meant to.
I'm proud to say that I use Denim that's made here in Australia.
It's probably a bit more expensive. But I'm happy to pay.

Unfortunately - the roll is so heavy that I can hardly lift it, which means that it almost permanently lives on my cutting table...