NorpacR2 is the new light, portable and rugged shelter fabric for comfortable work and play in extreme weather conditions. In tests with only an 8K BTU heater in a subzero environment of -10°F and a wind chill of -36° it was a balmy +48°F in the ice shelter made with NorpacR2 Extreme Weather Shelter Fabric. Inside the canvas shelter it was chilly 9°F!