Not a Mono. Not a Braid. The Next Generation of Fishing line. NanoFil is made out of gel-spun polyethylene, much like a superline. This ultimate spinning reel fishing line consists of hundreds of DyneemaÂ® nanofilaments that are molecularly linked and shaped into a unified filament fishing line. Dyneema, The World's Strongest Fiberâ„¢, gives this line superline type strength and our uni-filament process makes it feel and handle like a smooth monofilament.