Martin Authentic Acoustic Strings provide unrivalled quality, craftsmanship, and tone for your acoustic guitar. The strings are designed to produce a true, consistent tone, these custom-gauge strings provide excellent tuning stability and playability so your guitar can thrive during your rigorous practise and performance schedule. These silk and steel folk strings feature Martin's highest-quality wrap wire for enhanced longevity and durability. They are naturally corrosion-resistant, so they will hold up after hours and hours of playing. This total pack of professional-grade guitar strings will last you through long jam sessions, late-night campfire songs, and plenty of picking.