Get the best of two worlds. The V-OM1000NSX combines the traditional aesthetic of wood with the rugged resiliency of carbon fiber. SFT stands for Soundboard Fusion Technology. A thin spruce soundboard and unidirectional carbon fiber are fused in a single molding step. The resulting SFT soundboard resonates as a single unit, like a solid wood soundboard does. Thanks to the carbon fiber, the guitar sounds great and maintains the resistance to humidity and temperature swings that RainSong is famous for.