Non-Marking Slip-Resistant Fiberglass Shank Meets CAN/CSA-Z195 18,000 Volts Electrical Shock Resistance Standard ASTM F 2413-05 M/I/75/C/75 Steel Toe The 10 inch wellington upper is Black Full Grain Leather with 1000 Denier Cordura Shaft and direct injection construction. The lining is a comfort weave. The insole is a removable dual density polyurethane 'SHOCK ZONE' footbed. The shank is fiberglass and the outsole is a Thorogood Soft Streets Dual Density Polyurethane. Slip-resistant and non-marking. Also features ASTM F 2413-05 M/I/75/C/75 steel toe and electrical hazard protection meets CAN/CSA-Z195 18,000 Volts Electrical Shock Resistancetance Standard. Made in USA by ISO 9001 Certified Shoe Company. Perfect for general work or work around high voltage.