Frozen to -300 for super-consistent hardness and long life.
Gauges 10-14-23-30-39-47.
Martin Cryogenic strings are produced to the same high-quality standards as other Martin strings. An additional step in the manufacturing process exposes the strings to extremely low temperatures (-300 F), a process used in high-tech industrial applications where consistent hardness of metal materials is required. Many musicians feel that this process extends string life and enhances the tone of the strings. 80/20 bronze wound.