Aquila's revolutionary new approach, unique to them, is to change the specific weight of the material, increasing it progressively to leave the gauge almost unchanged. The result is amazing, instruments sound brighter, more powerful and more responsive through the entire range of the fret board. The strings also maintain their intonation better, because thicker strings need to be fretted harder, pulling them further out of tune.
The New Nylgut® is liable to suffer from cutting edges. Before stringing the instrument do make sure the nut and bridge are free from sharp edges and the nut grooves not too deep and perfectly smooth. You can get rid of sharp edges with very fine grit sandpaper.