It features a stout nylon and rubber co-molded outsole for efficient pedaling with impressive durability, grip and traction in rocks and mud. UPPER: Classic 3-strap closure One-piece Synchwire upper with thermo-bonded exo-structure Rubber reinforced heel and toe sections Reflective heel tab OUTSOLE: Co-molded nylon and rubber high-traction lugged outsole Mid-foot scuff guard Accommodates steel toe spikes FOOTBED: Die-cut EVA footbeds WEIGHT: 315 grams (size 42).