The Nautilus N1881 comes with the following features: Full grain nubuck leather upper. Composite safety toe cap. Removable anti-fatigue polyurethane insole. EVA midsole for maximum comfort. Highly durable, slip- and oil-resistant stabilizer outsole. No exposed metal to meet scratch resistant workplace requirement. 100% metal free. meets or exceeds ASTM F2413-11 impact/compression and SD ratings.