RockyBoots.com: This stirrup-ready collection is available in soft and safety toe to meet your safety needs.  Pairing our Rocky® Rebound heel with TPU heel stabilizer, fiberglass shank, and durable ¾ flex welt construction gives this boot a lasting lifetime that can keep up with your workload. Comfort is a priority in the Bronco, so we added an oil & slip resisting rubber outsole and our Rocky® Air-Port Lite® sponge PU footbed with memory foam which keeps your feet energized for long days ahead. This boot meets ASTM F2892 electrical hazard standard.