Now, I've never seen one of them ever... great idea... nice one mate.

 

Yeah those hand warmers are the best I an my buddies when I was a kid would pack our gloves and skiing/snowboarding boots with them to keep from freezing and man do they work. I have been riding stupid here lately I have good base layer but I have only been riding with regular boots and 'summer' gloves. I am going to have to do something my feet and hands freeze after a few miles.