This pattern is mainly a generic imitation of many insects that live on the river or lake bed. This version has a grey body and claret collar with a gold bead at the head to get the fly down to the fish. The pearly crystal tail also helps attract the fish. The pattern is especially attractive to Grayling as well as Trout. It can be fished with floating lines (+ long leaders) or with intermediate or sinking lines.
Please note that the size 16 has a slightly darker coloured collar than that of the sizes 12 and 14.