This pattern is tied on a size 14 hook and can be best described as a broad-spectrum dry pattern. It is a pattern that can raise fish when chironomid midges are hatching, it will take fish when medium olives are coming off the water and trout will even take it as a moth. The Gray Duster is a killing fly for both running and still water. The fly has a slim grey dubbed body and a hackle and tail of Badger cock hackle. Cast this fly to rising fish to realize its best potential but it will also work well as a search pattern. From April to October, it would not be amiss to have this tying on the end of your leader.