Berkley NanoFil Uni-Filament Fishing Line - 1500 Yard The first Uni-Filament fishing line - Not a mono. Not a braid. Effortless Casting - Casts longer with less effort. Extremely Accurate. Minimum diameter, Maximum Strength - Made with Dyneema. The thinnest line by label rating. Zero Memory - Virtually eliminates line tangles. Superb Sensitivity - Zero stretch to telegraph absolutely everything!