Berkely's new Vanish line represents a breakthrough in fluorocarbon lines. Berkley's scientists have altered the molecular structure of Vanish fluorocarbon to create a line that's virtually invisible in the water. Vanish is extra sensitive to detect bites, yet offers shock absorbency for fighting power after the hook set. Also the soft, low-memory formula casts easily, making it ideal for both spinning and casting reels. Due to the stiffness of this line, the manufacturer recommends using 17 and 20-lb. line on baitcasting reels only.