Side elastic panels for excellent stretch. V cut upper reduces stitching exposure. Toe spring is ergonomically engineered to reduce wearer fatigue. Shock Protection System SPS disperses shock at the heel strike and reduces skeletal stress on the feet, knees, and vertebrae. It also includes a large insert of PORONÂ® XRDâ"¢, the world's most advanced microcellular shock-absorbing protection for underfoot comfort. Leather lined for added comfort. Cushioned EVA footbed with PORONÂ® XRDTM insert in the heel strike zone. PU midsole for supportive comfort. Steel shank ensures correct step flex point and assists with torsional stability. Thermo urethane TPU gum outsole is highly resistant to hydrolysis and microbial attack, and is slip-resistant to oil, acid, and organic fat. Heat-resistant outsole for up to 284ÂoF. Imported.