backing

Spool of backing line used as reserve, very useful when fighting powerful fish. In addition to extending the total length of your line, backing increases the winding diameter of your fly line, helping to reduce fly line memory. A correctly filled reel also provides a higher retrieval rate when winding..

The backing provides a safety reserve by extending your line. It is essential when you have a powerful fish at the end of the rod whose rushes cannot be bridled. Backing increases the winding diameter of the line, providing faster recovery. It also improves braking by limiting the reel's runaway..