Rockerka (the original Czech name of this fly) is a top dry fly from the collection of Lubos Roza. According to Lubos, it works everywhere, always and for everything. The CDC forms the main buoyant part of the fly, helping it sit naturally on the surface.

A useful CDC fly with a bit of flash for trout fishing and in smaller sizes also grayling. In addition to the classic dry method we can use this fly as a top trailer when nymphing as a "float".