The Airush Quad Carbon Biotech construction is a vertical wood core sandwich comprising of a Balsa and Poplar core with ABS rail and tips. Through significant development of the quad layer multiaxial 100% carbon construction, we have been able to reduce overall weight for the same relative stiffness by up to 40%. However the true secret to the performance is felt in the refinement of the response, where the four carbon layers are directionally optimized for torsion and longitudinal response. The result is an incredible combination of explosive pop, improved the control on landing and increased ride comfort.