Martin Authentic Treated Medium 13-56 92/8

The next generation of Martin's legendary coated strings feature a new patented technology only available from Matin. This new technology protects the core wire and wrap wire to prevent corrosion without compromising tonal characteristics. Authentic Acoustic Lifespan 2.0 look better, sound better, and feel better while providing a smooth playing experience that reduces drag accross your fingers!

Comes in multiple sizes