The S-Film Emerger Buzzer Olive Barbless is an excellent, olive surface-film chironomid pattern with a translucent S-Film wing. It represents a midge pupa at the point of emergence, when the natural is trapped and vulnerable.
Fish it singly or on the top dropper of a light team. Leave it static in a ripple, or use tiny draws and long pauses on calm water. Keep it in the film rather than retrieving it quickly. This is the sort of dependable dry that can turn a quiet rise into a memorable take.