The D'Addario XT strings feature high carbon steel cores with extended lifespan on every string in the set, offering you improved break resistance, pitch stability, and long-lasting performance - all while maintaining the tone and feel of your favorite uncoated strings. These strings are made to stay, for performance that never fades.

The XT Acoustic Phosphor Bronze strings combine our most popular acoustic alloy with an extended lifespan on every string in the set, preserving the natural tone and feel of uncoated strings.