Nanofil. Casts 1.8 kilometers. Actual break strength is about half again above the rating, but is about half the thickness of the same weight mono. I use 10# on my light to medium rods and 6# on my ultralight and my dedicated crappie rod. Tie on a section of fluorocarbon for leader and you're set. Nanofil looks like dental floss: limp, thin, slippery, and strong as heck.
