Pearl iZUMi Men's X-Project 3.0-M Upper: 69% Rubber/Plastic/30% Textile/1% Steel Ring; Sole: 15% Rubber/8% Ethylene Vinyl Acetate/30% Carbon/45% Thermoplastic Polyurethane/2% Steel. Imported Synthetic sole Full-length tapered carbon fiber plate (patent-pending) gives on-the bike power transfer and off-the-bike hike-ability Co-molded rubber tips on hollow thermoplastic polyurethane lugs provide traction on an extremely lightweight bottom unit 1:1 anatomic buckle closure features a 25-degree angled strap design that follows the anatomic curve of the foot Run shoe eva foam heel absorbs impact for off-the-bike comfort Co-molded rubber tips on hollow thermoplastic polyurethane lugs provide traction on an extremely lightweight bottom unit, spd compatible