Berkley Flex Braid is a thermally fused PE superline built for anglers who want a braid that stands up to punishment without giving up sensitivity. Because it is fused rather than conventionally braided, it is considerably more abrasion resistant than a standard braid, so contact with rock, timber, mussels, heavy vegetation, or other underwater obstacles is far less likely to end in a breakage. The line is also very slick, which cuts down the noise it makes running through the rod guides — a real advantage when you are targeting wary, pressured fish. Berkley has given Flex Braid a slightly stiff construction, which helps it cast easily and further, and makes knots simpler to tie. Stretch is kept to an absolute minimum, so even the smallest and most timid bites transmit clearly back to the rod. Taken together, these properties make it a capable line for both fresh and salt water fishing. - Very manageable = Easy to knot, easy to cast, no windknots = less hassle when fishing. - Extra Tough = Very abrasion resistant = Less line breakage on Rocks, Mussels, Heavy Vegetation, and Timber. - Super sensitive = No stretch = Better bite detection.