Caterpillar Second Shift Men’s Boot Offering no-nonsense performance in a classic package, the Caterpillar Second Shift men’s boot is ready to work from the minute you clock in. It features a rugged nubuck upper and a tough, slip-resistant outsole, as well as a mesh lining for moisture management.Nubuck upperSteel toeMesh liningLace-up frontClimasphere™ sock linerSlip-resistant outsoleShaft Height: 6”