In the Blundstone 558 Black, Blundstone Canada re-creates a classic. Classic look. Classic comfort. Simplicity itself. Premium leather Thermo-urethane outsole resistant to hydrolysis and microbial attack. Polyurethane midsole for comfort. PORON XRD in the heel strike zone to dissipate heel strike shock. Comfort EVA removable footbed with PORON XRD in the heel pad. Extra set of footbeds for fit adjustment. Leather lined.