Cofra Men's New Asphalt 6" Safety Boot Black Leather Rubber sole STANDARD: CAN/CSA Z195-02 SOLE: HEAT DEFENDER PU/nitrile rubber resistant up to 572 F/300 C (1 minute contact) TOE CAP: non metallic TOP RETURN PLATE: Non metallic APT PLATE - Zero Perforation FOOTBED: THERMIC INSOLE, footbed made of soft and scented polyurethane, anatomic, insulating against high temperatures, covered with cloth. The thermal comfort inside the footwear is granted thanks to the special polyurethane compound devised to give high insulation