Fag butt fire-straw test: Little Smurf tampon filters designed to go in the end of a hand rolled cigarette. Each cellophane tube contains 5 units.
Findings: You can get them going with a flint and steel but compared to cotton wool it's a real bitch. I suspect that is mostly to do with the size of the strands. I also suspect that under decent magnification we would find the synthetic to be a lot smoother across the surface. Even teased out with a hacksaw blade they are no match for cotton wool teased by hand. Still, it is possible, and I got a steady ten count before the flame exhausted.