Beneath its deceptively peaceful surface, Mt. Unzen in southern Japan hides the awesome explosive power of a volcano. It was the hidden primal force of this mountain that inspired Shimano to create the Unzen hydration pack collection. With no excess straps or bulk to hold you back, Unzen bags are specfically designed to power an aggressive off road riding style. After installing you hydration system, just throw in your tools and favorite energy bar. Fasten the Rider Fix X Harness and head for the hills. The body hugging fit of Shimano's Accu3D technology frees you to follow the path less cycled. So if you're ready to unleash your own hidden power, try Unzen by Shimano.