by John Merwin

There’s a new fishing line out from Berkley this month that you’re going to be hearing a lot about. It’s called NanoFil. The company says it’s the strongest, thinnest line ever, designed specifically for greater casting distance and enhanced sensitivity with light- to medium-weight spinning tackle. I’ve finally obtained a sample, so here’s a quick report.
The line is made from Dyneema (gel-spun polyethylene) fibers as are many of the company’s other superlines. In this case, though, the fibers aren’t braided but are “molecularly linked and shaped into a unified filament,” according to Berkley. So while the line is effectively a single filament, it’s not a monofilament in the sense of extruded nylon lines. (Nor is it the same as Berkley’s FireLine, in which Dyneema fibers are fused by heat.)
It is round in cross-section, but not hard round like nylon monos. I can, for example, somewhat flatten a section of NanoFil with my thumbnail. It is, indeed, extraordinarily strong for its diameter. My sample spool is labeled 8-pound-test and .006” diameter. I measured the diameter at .007”, so it’s pretty close to spec.