Orvis Premium Fly Tying Kit?

Dave gave some pretty good advice here. When you take the course ask the
teacher to explain how to choose the correct materials and how to avoid the
wrong ones. I found this the most difficult thing for most of us to learn in
the beginning. It is not too bad with the synthetics, but choosing the correct
natural materials is the most difficult for me to learn then and after a couple
of decades as well.

Big Dale