The arctic pro is one of the warmest neoprene boots on the market. Perfect for the hunter or outdoor worker that gets cold easily or is in far northern climates. These 8mm 4-way stretch CR flex-foam, fleece lined boots set the standard in warmth and protective support. The 2mm foam under the footbed assures warmth in temperatures that can drop beyond -50 or when standing on ice. As with most muck boots, a topline binding keeps the snow and cold out, and warmth inside.