PRO LEADER II 100% Synthetic Imported Synthetic sole Seamless .9mm Second Skin Upper: the thinnest upper on the market, it adapts comfortably to your unique foot shape to eliminate hot spots and offers superior breathability. Power Web: a non-stretch web that easily conforms to your foot, but keeps you bolted to the pedal for maximum efficiency under hard effort. Bi-directional Closure: delivers a semi-custom fit by gathering equally from both sides for even foot retention, with the precision of a micro-adjustable Boa reel. Octane 1:1 Power Plate: Octane Grade Uni-Directional Carbon for feather-light stiffness; Direct-Vent technology for cooling and drainage; concave shaping for ultra low 6.5 mm stack height, enhanced plate stiffness and anatomic support.