Jumbo sized 8 gram pack of Nuclee-r Emission Wing material. Heat activation results in a beautifully attractive iridescent color that drives any predatory fish species wild! Special blending of U.V.A. Pearlescent multi-layered iridescent (and either another color of highly reflective iridescent or a bright reflective polyester) winging fibered material used to create fantastic streamers, flies and jigs from size 10 up to size 6/0 and better. Big 4gr bags. This material is great by itself or add it to other winging materials for added flash. Simply apply heat in Polaris Flies Patent Pending special process to make fantastic iridescent colors come alive to the already iridescent materials!