Men's Iron Age Groundbreaker Vibram Steel Toe Work Boots If you need a boot that works as hard as you do, look no further than Iron Age's Groundbreaker Vibram work boot! Tough enough to keep you safe and soft enough to keep you comfortable, this boot meets ASTM F2413 safety standards and features a electrical hazard protection, an external met guard to keep your feet safe, and a Vibram heat resistant rubber outsole. The full grain leather upper protects your feet against abrasion, oil, and chemicals, while the Kevlar® stitching and Goodyear® welt construction ensures your boots last years of wear and tear.