I have tried a few varieties of winter gloves including sealskins.Sealskins where great to begin with but they rip very easily and when its near freezing they just do not keep my hands warm.I cannot recommend them.
I have 2 pairs of waterproof gloves that I wear. I have an heavy duty pair that are cumbosome but they are dry and very warm when the temp is below freezing. They are ski gloves with a very hard wearing material on the fingers and palms.I got them a size larger then I needed as I wanted to see if having a cushion of air around my fingers would keep my hands warmer. It does, I only ever wear them on very cold days,they are superb.I bought them from an outdoor clothing chain called Tresspass for about £19.99. I have an other pair of waterproof ski gloves that are waterproof but are not as bulky on the hands,these where also bought from Tresspass for £17.99
Neil