Octane MTB 1:1 Power Plate: Octane Grade Uni-Directional Carbon for ultra-light stiffness * 1:1 Anatomic Closure: follows the natural anatomic shape of the foot to eliminate hot spots and remove pressure from your instep * P.R.O. 1:1 Heel Cup: with synthetic leather lining and external Carbon Power Band for maximum heel hold and power transfer * Pearl Izumi one piece upper with laser technology provides a second skin fit, minimum weight and maximum comfort * Molded TPU Toe Cap and high traction Rubthane lug tips deliver off-road durability and traction