The Aquila New Nylgut Concert Ukulele Strings will give your ukulele an even better sound. Aquila is a well-known brand in the world of strings thanks to its outstanding quality. And with the New Nylgut strings, your ukulele will sound even better. These strings are not made of nylon like many other strings, but of a three-layer plastic specially developed by Aquila. Not only does this make the instrument sound better. They also last longer and are less likely to go out of tune. Ideal for any ukulele player.