Upavon Pure Colour Crystal Chenille uses the Pure Colour formula to produce a translucent, light-catching chenille body material with consistent color batch to batch. The crystal finish transmits light through the fibers rather than reflecting off a solid surface, giving wrapped bodies a subtle internal glow that reads differently in the water than standard chenille. Use it for streamer and wet fly bodies, nymph thoraxes, and lure patterns where you want color with depth rather than flat opacity.