Product Information for Blundstone Product Description This elastic side safety boot features polyurethane midsole/Thermo urethane outsole highly resistant to hydrolysis and microbial attack. Removable xtreme comfort EVA footbed with PORON® XRD™ forepart inserts providing greater underfoot comfort. It has a non metallic penetration resistant midsole with ick guard toe leather protection, electrical hazard resistant, and steel shank for maximum torsional stability. Additional Info Safety Fit: True to Size