I concur with 79pmooney's suggestion. Of course the style of glove I use depends on the temps I'm riding in. Below 50F down to about 40F...I can get by with fleece gloves. But for temps down into the 20sF...Mittens! As long as the liner is also a mitten and your fingers are all together. "There's strength in numbers." I have the Pearl iZumi lobster glove/mitten. They were very good years ago when I got them. But I too in recent years have experienced numb fingers in the very cold more and more. Finally, last year I grabbed a pair of nylon-windprood-water resistant-long sleeve mittens at the local discount store for just $10.00. For the really cold temps they're better that the lobster gloves, and way better than regular gloves.

Dan