Pearl iZUMi Men's Race RD IV-M Cycling Shoe Upper: 65% Rubber/Plastic/33% Textile/2% Steel Ring; Sole: 2% Rubber/3% Ethylene Vinyl Acetate/70% Nylon Plastic/22% Carbon Fiber/3% Steel Imported Synthetic sole Select 1:1 power plate composite fiber plate with carbon fiber forefoot insert for lightweight stiffness and durability; direct-vent technology for cooling and drainage Bi-directional closure: delivers a semi-custom fit by gathering equally from both sides for even foot retention, with the precision of a ip1 micro-adjustable boa reel Eva foam and rubber heel bumper gives stability and walking comfort Select insole: provides excellent longitudinal and transverse arch support Spd compatible