The Blundstone Australia Men's Original 510 Boot is lean, clean and straightforward. Like most Blundstones, they include a removable comfort footbed and ergonomically engineered toe spring to reduce fatigue. Premium leather. XRD Technology in the heel for supreme shock absorption. Polyurethane midsole for comfort. Thermo urethane outsole highly resistant to hydrolysis and microbial attack. Oil, acid and organic fat resistant. Lightweight and durable.