Another vote for seal skinz - good for putting away the roof tent in the morning when the zips frozen and sticky palms too.
If you just want to be warm then Dachsteins mittens are the best and, though made of wool are waterproof - good for snowballs. Mine are 25 years old and still going strong.
I use the polygrips at work and are fine but not quite warm enough for my needs in winter.
"Never have a stupid argument with an idiot - he gets a lot more practice than you"
there I go again
not too hard really