Plenty of action from the zonker strip on this fly means that fish simply can't resist. The tungsten bead increases the sink rate and makes this fly very effective on a sink and draw retrieve.
From the designer, Lubos Roza:
"A natural type of zonker streamer for use in clear waters. The soft zonker imparts a lot of movement which drives the fish crazy. The fly contains just enough flash to induce a strike but not too much to spook the fish when used in clear waters."