According to Martin's website, Hunt uses Martin SP Lifespan guitar strings.
Seth Avett uses these Martin Strings on his Martin D-35 Guitar.
For his acoustic, Aaron uses Martin SP Lifespan Phosphor Bronze strings (.012–.054). [Source](http://www.premierguitar.com/articles/21257-aaron-freeman-return-to-form?page=3).
According to Martin's website, Goldsmith uses Martin SP Lifespan 92/8 light strings.
According to Martin's website, Dennen uses Martin MSP7100 strings.
Love them so far. I am rough on my gear at times and they still sound like new. Maybe lighter in the future.
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