Made with genuine leather. Steel Toe Rating: ASTM F2413-11 M/I/75 C/75 EH. Nylon mesh lining. Removable EVA sock lining. Molded polyurethane midsole. Supportive steel shank. Rubber outsole. 6 shaft. Vendor Style: P89983. Caterpillars Flexion construction makes their Generator work boots as tough as nails, but as comfortable as your favorite pair of shoes. The steel toe meets/exceeds the ASTMs standards for protective footwear, keeping your feet safe while on the job. Made with full grain leather, Generator work boots feature a supportive steel shank, nylon mesh lining, and a molded polyurethane midsole for ultimate comfort, no matter what your job is.