Our Iron-Tuff gear is comfort-rated down to -50°F and these HiVis Iron-Tuff Coveralls are built tough with durability you can count on for years to come.HiVis Iron-Tuff Coveralls are ANSI Type R, Class 3 compliant and 3M Scotchlite reflective tape provides added visibility. The coveralls also feature insulated, oversized pockets, heavy duty knit cuffs, and bound seams to seal out cold drafts.Extreme durability, legendary warmth - it's the original way to Master the Cold.