The Flat Braid is made of 8 braided plies of UNI-Mylar. That makes outstanding butts, bodies and ribs for large flies. You can also fray this material for tailing. Available on spools of 7 yds in 6 colors: Pearl, Gold, Silver, New 2008: Holographic Silver, Red and Pearl/Red. Also available in combo pack.
It is a very "bright" material.