After correspondance with Rocky, I will be getting PV for recovering my car seats in my roadster. Now, to decide which and how much . . .

From what I uderstand and have seen, PV looks/feels much more like a mid-weight wool. Poly cotton is much thinner and is closer to a cross between flannel and light weight wool.

I'd much prefer PV.

Also, be warned: Only a few use PV. Rocky is one and (I think) Bear is another. I will not speak for others.