Built on the original series sole, Blundstone lace up boots feature our most advanced comfort technology and premium leather. Leather lined for comfort. In Rustic Black, these stylish boots are built to withstand whatever the elements throw at you. Premium leather Polyurethane (PU) midsole/thermo-urethane (TPU) outsole highly resistant to hydrolysis and microbial attack. XRD in the heel strike zone to dissipate heel strike shock. Comfort EVA removable footbed with XRD in the heel pad. Extra set of footbeds for fit adjustment. Leather lined.