Originally Posted by smrobs
I never have, but I've not really looked. About the closest I've found is using those air activated hand warmers and putting them on the backs of your hands (or in the palms) inside of a decent pair of gloves. I used to do that when I was working nights outside in the winter. Worked rather well, actually.
I have those handwarmers. I buy them almost in bulk. They are good, but they don't keep fingers warm. I have poor (next to nil circulation) at times due to a health issue. So I have a harder time then many people to keep those fingers and toes warm :) With the handwarmers, when I'm riding, I keep one in my pocket and switch off hands - one on the reins, one getting warm.
If I can wear mitts, I'm generally OK though, so I do that as much as I can.