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Per six flies, one pattern / size. *Isonycia & March Browns are tied on XL hooks.


My "modernized" version of Vince Marinaro's iconic Thorax Dun design preserves the key elements or "triggers" Vince emphasized in the original. My pattern incorporates modern materials that create a truly effective mayfly dun imitation and pay tribute to the master himself.

CDC Thorax Duns

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