Hard work is at the heart of the Second Shift steel toe work boot. With classic styling and rugged detailing, this basic boot tackles a number of jobs. Stay comfortable and experience the durability and attitude Cat Footwear delivers. Upper is made from nubuck or full-grain leather. Nylon mesh lining. Slip-resistant soles reduces the risk of slips and falls -- the hazard of low-traction surfaces. Steel toe is rated ASTM F2413-11 I/75 C/75, the highest available strength for impact and compression. Rated ASTM F2413-05 1/75 EH -- special electric hazard construction protects the wearer against open circuits up to 600 volts in dry conditions. Climasphere insole and Goodyear welt construction.