The ORIGINAL spey feather (other than the extinct Spey Cock). If you have tied with Heron substitutes like Rhea or Blue Eared Pheasant, you will quickly notice how much better the original is.
Marabou is a Turkey body feather. It has a fluent life like breathing action that make it incredibly useful. Marabou can be used for Streamers, tails, bodies, throats, collars, wings, you name it!!