The Elite RD features the same revolutionary 1:1 Adaptive Fit system as the P.R.O. leader, which conforms to your unique foot shape to eliminate hot spots without sacrificing a watt of power transfer. Combined with the extreme light weight of one of the most technical cycling uppers ever created with the precision of the Boa retention system. Fully bonded upper eliminates uncomfortable seams and hotspots. 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. Integrated boa lace guides allows for an extremely low profile upper that excellent pressure distribution. ELITE 1:1 Power Plate: ELITE Grade Uni-Directional Carbon for ultra-light stiffness. Direct-Vent technology for cooling and drainage; concave shaping for ultra low 7.0mm stack height, enhanced plate stiffness and anatomic support; and built in Longitudinal Arch Support for optimal power and efficiency. Now with replaceable heel bumper.