From Grado website: "To be blunt, this is one of the best sounding we've built... ....but the headphone is a joint effort. We've built maple into the housing". it seem's to me the Hemp is possibly a bit of a marketing ploy as it is used as some sort of inside damping material, which very well could help sonically. They ARE very attractive to me. I'd be interested to hear user's feedback. Should go over well with Grateful Dead fandom, also the Hipster crowd. Just kidding.
