The 1st, 2nd and 3rd strings are top quality clear Alliance fluorocarbon trebles. The characteristics of this polymer give the string its bright, rich, beautiful and ringing clear sound. The trebles are the same as in the Savarez Alliance sets. NEW CANTIGA PREMIUM BASSES are manufactured with very new raw materials. Their production is based on the best new technology in polymer science and led to the development of new computer controlled machines for manufacturing. The Cantiga Premium basses have a rich resonant and warm sound. Great volume and projection for your guitar performance.