Berkley Vanish Fluorocarbon Line remains clear underwater, which makes it virtually invisible to any nearby fish. This is important when fishing in clear water where line visibility has the potential to spook a fish from your bait or lure. It is also useful if the fishing is shut down and you want to try some finesse-style fishing. Berkley Vanish Fluorocarbon Line works because of the unique formula that refracts light similar to water. This line is rated to 8-pound which is ideal for estuary species, such as bream and flathead. It is also perfect to use when trout fishing in rivers or dams. Fluorocarbon is a great leader material when fishing with braid. Simply connect the 2 lines with an Albright knot, or any other of the knots that create a strong connection between 2 lines. Berkley Vanish Fluorocarbon Line will give you a competitive edge over your mates, and they will be asking you what your secret is!