- Treated with Martin's Clear tone proprietary technology for a longer lifespan than regular strings
- Designed to repel the oils and dirt that can deaden strings
- 92/8 phosphor bronze provides a classically expressive tone
- Gauge (medium): .013, .017, .026, .035, .045, .056
Size:Small Medium Large X-Large 2X-Large
Rich tone should last as long as the inspiration does. Martin SP Lifespan strings are the next level in studio performance. Treated for long life, they repel dirt, grit and other environmental elements that can quickly alter the sound of your strings. The treatment is so incredibly thin, you won't even know it's there. SP Lifespans are designed to last longer and sound better so you can play on!