Hareline Flashabou is the gold standard for adding flash to streamers, nymphs, and saltwater patterns. It comes in a wide array of colors and blended colors to fit any need.
Hareline Flashabou is a straight fiber flash material used mostly in streamers. Since it is not kinked it tends to have more flowing movement with flies that you want to move and pulse in the water. It is also good for wing cases on flashier nymphs.