Lightweight and durable, the Original Series Boot is a winner. The premium leather upper has dual elastic insets on either side of the shaft to give a perfect fit. Pull on straps make it super easy to get in and out. A polyurethane midsole makes for improved comfort and cushioning. A thermo urethane outsole provides resistance to hydrolysis and microbial attack. A steel shank gives you torsional stability. Poron® in the heel strike zone helps absorb impact and shock with every step. Removable footbed.