Looking for acoustic guitar strings that will last longer than usual, and sound great no matter what? Check out the Martin Authentic Acoustic Lifespan 2.0 string set, this one in a light gauge of 12-54. Engineered with a new and patented technology from Martin, these strings are developed to protect the core wire and the wrap wire to prevent corrosion without compromising tone. Authentic Acoustic Lifespan 2.0 strings look better, sound better, and feel better, providing a smooth playing experience that reduces finger drag. Martin Authentic Acoustic Lifespan 2.0 strings offer next generation treatment for long life, great playability and feel, and superior reliability with authentic tone.