CarharttMen's Rugged Flex Relaxed Fit Heavyweight Double-Front Utility Logger Jean

Q: Is the fabric kind of stiff likr canvas or more flexible like cotton?

The fabric is flexible like cotton, it has a finer weave than canvas.

Q: How much will these shrink?

Not much at all. They do tend to stretch a hair if you wear them more than one day.

Q: i usually wear the B01 or the B11 relaxed fit. can anyone give me a comparison

Order the same size but these will fit a bit more snug. I have worn the B01s for around 9000 years and use these for lighter construction days or days when I meet clients. They are simply a lighter duty pant that fits a little tighter. I really like them but still use the B01s as well.