This is a variation of the original American pheasant tail nymph, created by Frank Sawyer in 1958. This is an excellent go to fly, out performing the original. The tensile represents the air bubble most aquatic insect larva(nymph) use to rise to the top to hatch. A major turn-on for trout. Imitating a large number of aquatic insect larvae including mayfly nymphs. Landing trout all year round but works best when there is a mayfly hatch. Best way to use this nymph pattern is a dropper on a double dropper setup. You want the Flashback Pheasant Tail Nymph to suspend off the bottom looking like it is rising. 4X-6x tippet and tapered leader are great choices.