Specially designed for the North American climate; Lightweight, molded abrasion resistant polyurethane boot; Wider fit at calf and foot; Polyurethane thermal insulation resistant to cracking in cold weather down to -50 ° C / -58 ° F; GelFlex polyurethane midsole provides comfort while reducing fatigue; Oil and acid resistant rubber outsole that provides superior protection in extreme cold conditions; Lugged outsole for increased traction on compacted snow and ice; Non-metallic safety toe cap and plate; Insole designed for comfort; CSA, ASTM, CE certification; Certification of resistance to electric shocks and other electrical hazards.