The Martin OM Biosphere isn't just an acoustic guitar, its a call to action on climate change and a reminder to preserve our planet for future generations. To show support for preservation and replenishment of coral reefs, which are some of the most diverse and valuable ecosystems on Earth, the top is adorned with stunning artwork by renowned artist Robert Goetzl, depicting a colorful ocean scene. This model is 100% FSC certified and even the gig bag is made from hemp, which is a Martin first. So, share your support for our oceans by playing one of the most environmentally friendly guitars on Earth.