Spirit River UV2 Grizzly Soft Hackle - Virtually usable for every type of scenario, the Grizzly Soft Hackle is great for buggers, damsels or even soft hackles. They come UV2 enhanced which means they use the proven UV2 technology by Spirit River and have been double dyed to give them unique and added wave lengths that are prime for catching the attention of fish. The UV Florescence and UV Reflectance provide a wave length that humans are unable to perceive yet the fish recognize and are attracted to it. UV2 TechnologyUV FlorescenceUV ReflectanceDouble dye process