Turle Knot1. Thread fly onto tippet and leave several inches of tag end to form the knot. Double the line back onto itself toward the fly and then bring the tag end behind then over the doubled line, making a loop. Pass tag end twice through the loop created, essentially tying a double overhand knot.
2. Tighten down the knot just created and slip the loop over the fly. Pull on the leader to set the knot tight against the hook eye.
3. Trim the tag end.