Temperature Rating: -100°C/-148°F. Oil and acid resistant Neoprene and leather upper design. Oil and acid resistant stitching, laces and metal free hardware. High visibility reflective strips. Oil and acid resistant rubber outsole for slip resistance in extreme cold temperatures. Ice Bear outsole design for additional traction in ice and snow. Light weight PU base is cold crack tested to 50,000 flexes at -50°C/-58°F. Light weight GelFlex mid-sole provides cushioning to reduce fatigue and improve comfort. Improved fit allows for maximum comfort and support. Metal free safety toe and plate with electric shock resistant sole. Baffin -100°C/-148°F 8 layered inner boot. Micro cellular waffle foot-bed traps air and moisture. Frost plate foot-bed. CSA/ASTM/CE approved. ESR/EH rated.