Pearl Izumi Men's Elite RD IV Cycling Shoe 100% Manmade Synthetic sole Fully bonded upper eliminates uncomfortable seams and hotspots. Integrated BOA lace guides allows for an extremely low profile upper that excellent pressure distribution 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 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