• Crafted by the World's Top Acoustic Brand: Martin, a leader in acoustic guitars, brings you these top - notch strings. Their strings factory in Navojoa, Mexico ensures flawless quality control, so each set is as great as the last, packed in long - lasting foil wrappers.
• High - Tensile Steel Core: The core of each string is made of high - tensile steel, tin - plated for corrosion resistance. This gives bold and powerful fundamental tones, enhancing any acoustic guitar.
• Premium Bronze Alloys: Specific ratios of premium bronze alloys for the wrap wire provide the best acoustic tone. 80/20 Bronze offers bold, bright sound, while Phosphor Bronze adds lo - mid warmth and smoother highs.
Martin Authentic Acoustic Superior Performance (SP) are the flagship and the most desired acoustic guitar strings. Upgrade your guitar now!

These Martin acoustic guitar strings are perfect for guitarists of all levels, whether you're a beginner learning chords or a professional on stage. Use them during live performances, studio recordings, or just for casual playing at home. Each string has a high - tensile steel core with tin - plating, and the wrap wire uses premium bronze alloys. The 3 - pack comes in modern foil wrappers for long shelf - life.