Pearl iZUMi Women's W X-Project 3.0-W Upper: 69% Rubber/30% Textile/1% Steel; Sole: 45% Thermoplastic Poyurethane/30% Carbon/15% Rubber/8% Ethylene Vinyl Acetate/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 poyurethane 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 Ethylene vinyl acetate foam heel absorbs impact for off-the-bike comfort, Women's specific fit has reduced volume and narrower heel Co-molded rubber tips on hollow thermoplastic poyurethane lugs provide traction on an extremely lightweight bottom unit