REBEL Miners Heavy Duty Work Boot The Miner Boot is a heavy duty ultra-comfortable work boot designed for use in tough environments. A heat-resistant outsole (up to 300° Celsius), steel midsole for anti-penetration and a Poron XRD built-in metatarsal guard ensure ultimate protection. A TPU toe bumper for scuff protection and TPU heel support guard provide added protection and support. The Miner Boot is ISO 20345 approved. SKU: RE954