So chemically I have no idea! But how you do it: when you slick your skin with the oil you use a special curved bone tool to massage it into your skin. Each person has their own. It seems to do two things, and you apply it twice in one ‘bath’. The first time it does pick up some dirt and sweat (not much sweat in those temperatures to be honest) and you kinda flick that oil off, not rub it in. Then, the next round you rub the oil in. It protects from wind and frost, and keeps your skin from drying out. It is very dry in winter in the arctic. There is almost no humidity and the snow is so dry you can’t make a snowball and when you come inside the snow on your clothes just evaporates, doesn’t even leave a puddle. I had a terrible time with my skin cracking and bleeding the first winter. My hands especially. The older women gave me a special fat that is mixed with some herbs to make more of a slave to help with that.