ALL NEW OCTANE 1:1 Power Plate: Octane Grade Uni-Directional Carbon for feather-light stiffness. Anatomic Closure: follows the natural anatomic shape of the foot to eliminate hot spots and pressure points. Octane SL Insole: provides unheard of light weight support. Pearl Izumi one piece Clarino Rovenica Upper with Direct-Vent Technology provides minimum weight and maximum breathability.