106F is waaaaaay beyond my comfort level. And if it's that warm, then it goes without saying that loads of dangerous beasties will be enjoying the heat too. No thanks
In answer to your question Paul
High setting = 60C for 120 minutes
Medium Setting = 50c for 180 minutes
Low setting = 40c for 240 minutes
I'm comfortable with the medium setting between 1 and 5 degrees (the lowest I'll ride in) and 3 hours is well in excess of my other bodily extremities freezing and dropping off!
The only downside is that they are a bit bulky, but very comfortable. The temperature is easily adjusted from the push buttons on the outside of the glove and the batteries take about 6 hours to charge.