100% non-metallic, with protective toecap and midsole, Manitoba is a cold temperature boot developed with specialist materials that are certified for use in temperatures as low as -40°C, including 3M Thinsulate B600 Ultra, Fursulate fur lining and a shock-absorbing solid nitrile rubber outsole. It features a no. 8 YKK side zip for convenience.  Additional Features: Anti-Static Protective Toecap Protective Midsole Water Repellent Upper Oil Resistant SRC Slip Rated HI Resistant Outsole to 150°C Cold Insulation Heat Resistant Outsole to 300° 100% Non-Metallic Construction Zip Fastening Ladder Grip Rock Fall Manitoba Freezer Rigger Safety Boot