I love this stuff! True story, I once dreamt that I had to stitch up my thumb after a treble hook incident and I used Veevus. I don't know how the Danes did it, but 6/0 through 14/0 are apparently rated at 110 denier. It flattens well, chords up well and is easy to transition with just a few spins of the bobbin. When I tie flies for friends, I make sure I use high quality UTC Ultra, Uni or Danville products. I save the Veevus for myself.