Designed for superior performance in the snow, these cold weather boots offer protection in temperatures as low as -40°C (-40°F). With nylon uppers, thermal rubber feet, these snow boots include a polar fleece lining for added warmth, foam insoles for maximum comfort, and reflective bands for increased visibility. Cold protection down to -40°C (-40°F) Outer material: Nylon for the upper of the boot and thermal rubber for the boot's foot. Lining: Non-removable short faux fur Comfort foam insole Cord adjustment with barrel closure Reflective bands Part 1: 100% PU - Part 2: 100% Polyester Fits true to size From size 11C to 6J