I have a friend who has an old fire hose which appears to be in pretty good condition. It is stamped as "Linen EX", so I know that it is linen, but how do you tell the difference between cotton/canvas linen and flax linen? I don't want to go through the bother of making a cotton linen strop because I have a Kanayama branded one that fits that ticket that came with my 80000. It is very good, but I just gotta have a flax linen strop to round out the stable, so to speak. Any help in identifying flax vs cotton would be appreciated.