The ultra light P.R.O. MTB II delivers superior off road performance, efficiency and comfort with breakthrough innovations like our P.R.O. Carbon 1:1 Power Plate and patent pending 1:1 Anatomic Buckle Closure System. P.R.O. MTB 1:1 Power Plate: P.R.O. Grade Uni Directional Carbon for ultra light stiffness Direct Vent technology for cooling and drainage concave shaping for enhanced plate stiffness and anatomic support built in Longitudinal Arch Support for optimal support, power and efficiency. 1:1 Anatomic Buckle Closure: closure follows the natural anatomic shape of the foot teliminate hot spots and remove pressure from your instep, and an adjustable instep strap with adjustable buckle mounting plate delivers ultimate fit and flexibility patent pendingP.R.O. 1:1 Heel Cup: with synthetic leather lining and external Carbon Power Band for maximum heel hold and power transfer. P.R.O. Insole with dual density EVA for optimal Longitudinal and Transverse Arch Support. 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.