Ultima Pure Power Carp is a unique 100% pure fluorocarbon mainline that is very strong with an exceptional knot strength and outstanding abrasion resistance. Pure Power is made using a unique softening process that makes it much more castable than other fluorocarbons. It is also the first pure fluorocarbon to be produced in a coloured version as well as clear. This colouring has chameleon like properties and blends in perfectly with its surroundings on the lake bed. As a pure fluorocarbon, Pure Power sinks like a stone and follows the contours of bottom, eliminating any chance of spooking wary fish when slack line fishing. An awesome product.