The Iron 6" black/red is a heavy duty boot construction. It features a light weight composite safety toe for protection. The upper is full grain waterproof leather with a COA.TEX® breathable, waterproof membrane to ensure you have dry feet. There is a polyurethane midsole for support, cushion and flexibility with a very aggressive tread TPU outsole. The EVERCUSHION®MAX footbed has HYPRO® odor control antimicrobial treatment along with a soft polyurethane blend for superior cushion.