Fire resistant, durable smooth-out leather upper extends use beyond fire season to function as a station boot breathable, moisture-wicking mesh lining lightweight, mountaineering-inspired, design full-length polypropylene board with integrated steel shank for optimal rigidity and stability underfoot strength and durability of handcrafted opanka-stitch construction cushioning, single-density open-cell polyurethane ortholite® footbed Vibram® S587 outsole for oil and slip resistant traction over rugged and high-angle terrain made in usa with domestic and imported components nfpa 1977: 2016 edition certified electrical hazard protection astm F2892-11 EH