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 Dyneema nanofilaments that are molecularly linked and shaped into a unified filament fishing line. Dyneema, the world's strongest fiber, gives this line superline strength-type strength and Berkley's uni-filament process makes it feel and handle like a smooth monofilament.