Martin Authentic Acoustic SP Guitar Strings, .11.5-.47 Custom, Silk and Steel

These strings are engineered with the performer in mind and they will always stand up to rigorous practice 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 their highest quality wrap wire you get consistent true tone that you can count on song after song.