Inspired by the lace ups Blundstone® first made in the 1800s, this series of boots feature their most advanced comfort technology and Premium Leather. Built to last, these boots will stand up to whatever the elements throw at you. Premium Leather upper Leather lined Lace-up Steel shank TPU removable footbed PU midsole TPU traction outsole Fit Tip: AU/UK Australian & United Kingdom sizing = US United States Men's sizing Product Features: Upper:Premium Leather Lining:Leather Outsole:TPU (Thermoplastic Polyurethane) traction Support (shank):Steel Midsole:TPU/PU (Thermoplastic Polyurethane)/(Polyurethane) Footbed:TPU (Thermoplastic Polyurethane) Blundstone Men's Original Lace-Up Boot