How cold, and what do you want them to do? Shooting gloves?
I live in Alaska, do a fair amount of shooting outdoors down to about 0 degrees.
I have the Coldshot gloves. They really shine in 30-50 degree weather, depending on how warm your hands are (mine tend to stay pretty warm). Yes it says good down to 20, but not a chance, they don't really have any insulation in them. For above 50, I run OR Overlords.
From 0 - 30 I run their Super Coulior Liner. They aren't waterproof, but it really doesn't matter at those temperatures. Great glove, great dexterity, works great pistol and rifle. Now, below about 15 degrees, these gloves still aren't warm enough for full time use, but they will work great to run a few strings of fire. Below about 15 I run the OR Firebrand, but switch to the Coulior to shoot, or take off the shell and use the liner.