size: 15 mm / approx 5/8 in Hook: J:son SS.DF #18
This imitation of an adult mayfly in the dun stage has all the right proportions and properties. It looks natural, feels natural and fish will eat it.
If you want to imitate large sized Brown May Dun's, this is the color to use.
We do recommend you to use a J:son Swivel for all your fly fishing and all your flies. However, it is necessary to use a J:son Swivel whenever you are fishing a J:son fly in size 1 or 2.