I have cold hands, and live in a cold part of the world...5 finger sturmfists work okay down to freezing. 4 finger sturmfists are much better. My hands were starting to get cold after about 2 hours. Today's ride started at about 20 F and ended at about 4 F.

The ultimate (so far) is sturmfist 5s and Pogies. I use dogwood insulated pogies. The sturmfists use aerogel insulation between you and the bike, and that part of the glove system works very well. I haven't found a situation yet where this combination doesn't work.

I don't much care for the inconvenience of pogies, though, and avoid them when I can get away with it.