The Bolted boot is a part of the new ULTRADUTY collection. For the hardest jobs and the toughest environments, you'll never need more than UltraDuty. Built from the ground up with our Ergo design philosophy, Bolted combines extreme comfort and flexibility with maximum durability. In an easy pull on wellington style, the Bolted is a easy choice. ASTM F2413-11. Full Grain Leather Upper. Nylon Mesh Lining. Nylex + PU Foam Sock Liner. Molded PU Midsole. T1200 Outsole. Strobel/Cement Construction. Boot Height: Approx. 6'' Tall.