I tried a multitude of "cold weather" gloves from a variety of mail-order houses. They all leaked air, despite their claims, and just didn't do the job.
I ended up with a pair of gloves I got from Targert for $6.00 on sale, many years ago. I wear them constantly, they don't leak air, and they are not too tight around the wrists, so my hands don't sweat.
They are extremely durable, and, sadly, I have never seen any more like them, or I would buy 5 pair just lke that!
For extremely cold, I use ski gloves.