Martin Authentic Acoustic strings are engineered with the performer in mind and they will always stand up to rigorous play and performance schedules. Martin starts with their highest tensile-strength core wire, then tin-plate it on all six strings for added corrosion resistance; because what you don't see matters! When coupled with Martin's high-quality wrap wire you get consistent tone that you can count on song after song.

Martin's next generation Lifespan 2.0 strings are engineered using a new, patented technology only available from Martin. This technology was developed to protect the core wire and the wrap wire to prevent corrosion without compromising tone - the single most important attribute of the guitar strings. Lifespan 2.0 strings ensures they will sound better, longer than any other extended-life string on the market.

Martin Authentic Acoustic Lifespan 2.0 strings offer next generation treatment for long life, great playability and feel, and superior reliability with authentic tone! Also available in Phosphor Bronze 12 (Light) & 13 (Medium) gauges.

String gauge: E - .011, B - .015, G - .023, D - .032, A - .042, E - .052