I use Delaware River Club spectrumized dubbing (Red/brown) for the Hendricksons. I really like this dubbing because it is a blend of many colors that give an impressionistic look to the fly. The wet or soft-hackle version of this fly was also a top producer for me. I start off fishing the wet trailed off the bend of the comparadun. Initially, I catch fish only on the wet, then as the fish start focusing on the adults they will take the comparadun and then back to the wet when the hatch tails off.
Size 12 wet fly hook (2x heavy)
UTC rusty brown thread
brown partridge fibers for the tail
Red/brown spectrumized dubbing
gold oval tinsel rib
brown partridge hackle