Flylab Gel Spun Flyline Backing 400M.
$45.00
Gel Spun backing or Spectra backing (they’re all pretty much the same). Gel Spun backing is braided from polyethylene and also has increased line strength and decreased line diameter. Because of its small diameter, one huge benefit of Gel Spun and PE backing is that a higher capacity of backing can be spooled onto a reel. That being said, it offers less stretch than Dacron.