J:son Mayfly Dun 3 Olive Grey #18 realistisk High Quality: Exact proportions and

High Quality: Exact proportions and biological colours that perfectly match the natural insect’s final life stage

System Integration: Perfectly calibrated for use with J:son Wing Material – C5

resulting in bulky flies and hours of tedious work

The name "Gritter Bug" refers to its buggy

For serious fly tyers

J:son Mayfly Dun 3 Olive Grey #18 realistisk High Quality: Exact proportions andThe Mayfly Dun: The Moment of Truth (The Crucial Stage) The stage of the newly hatched adult Mayfly is called the Dun. This is arguably the most critical phase for the fly angler. Depending on surrounding circumstances such as temperature, wind, and weather, the time it takes before the Dun is able to fly away from the surface will vary. These newly hatched Mayflies are often an easy and vulnerable target for the fish, and many will end up in Mr.