Salmon Fly Hair is very select back strip and mane. This is the perfect hair for tying Salmon flies, one of the most sought after dry fly hatches in the western U.S. The Cow Salmon fly hair averages 2 inches in length, and the Bull is 2-3 inches on average. This is a fine hair with the perfect amount of flare, allowing it to lay flat and full for a impeccable salmon fly.