The ultra lightweight Octane SL II MTB combinesThe performanceTechnology of our Octane Road shoe and an off-road specific carbon sole with highTraction lugsTo createThe lightest, fastest and most efficient mountain bike shoe available. Octane MTB 1:1 Power Plate: Octane Grade Uni-Directional Carbon for ultra-light stiffness; Direct-VentTechnology for cooling and drainage; concave shaping for enhanced plate stiffness and anatomic support; and built in Longitudinal Arch Support for optimal Support