We worked with Jason Isbell to create a set of strings that deliver the tone, feel, and reliability he demands night after night. The Martin Era™ Artist Light set combines a traditional SP® core for that unmistakable Martin warmth with advanced Lifespan® treatment to resist dirt, sweat, and humidity. Finished with signature red silk-wrapped ends, these phosphor bronze strings are built to last longer and play smoother—just the way Jason likes them. Because when your name’s on it, every note has to count.