Martin MA140T 6-String Acoustic Guitar Authentic Lifespan 2.0 80/20 Bronze 12-54 - set of strings

Lifespan strings are based on Martin's patented technology, which protects both the core and the thread of the string from corrosion without denaturing the sound. Authentic Acoustic Lifespan 2.0 strings stay looking new longer, sound better and are more pleasant to the touch. Two years of research have enabled Martin Guitar to develop the best-performing long-lasting strings on the market.