RIO's premium 65lb, 8 carrier backing is made of the finest materials from Japan. 8 Strands of tightly woven fibers makes for a round backing that stacks perfectly on the fly reel. The result is a stronger, softer and smoother performing backing. Features Include:From pan fish to ultra-big game such as giant trevally, billfish and tarponAllows for more spool capacityThin, Slick, StrongLess Water DragTends to twist when knotted