Easy casting Berkley® Vanish® has become a popular 100% fluorocarbon line in the U.S. and Canada. We have been continuously improving the Vanish formula since it was introduced 15 years ago. Great value, great performance. Remains clear under water – 100% fluorocarbon refracts light similar to water. Non-absorbing fluorocarbon maintains strength and abrasion resistance under water. Traditional fluorocarbons are stiff, Vanish is designed to be more flexible.