The new Cantiga Premium basses are made with new raw materials. The trebles are the same as in New Cristal Cantiga games. The 1st, 2nd and 3rd strings are in New Crystal, a high quality clear nylon. The treble, 1st, 2nd and 3rd strings, made of Alliance composite are known for their brilliance and projection. The trebles are the same as in Alliance Cantiga games.