Berkley’s NanoFil Uni-Filament Fishing Line is the next generation of fishing line - and in a class all its own. Not a Mono. Not a Fluorocarbon. Not a Braid. It's constructed from gel-spun polyethylene, much like a superline, it consists of hundreds of Dyneema nanofilaments that are molecularly linked and shaped into a unified filament fishing line. Dyneema is one of the world’s strongest fibers, providing NanoFil with superline-class strength, as wells as zero-stretch and exceptional sensitivity.