I go with a wool mitt that is particularly good when wet. For particularly windy/cold midwinter conditions when I'm not too active and really covered up everywhere else it would make sense to add a light wind/rain layer. I can't see anything weight 3 or 4 oz making much sense though, unless I was cold water paddling. There is always the option of putting your hands in your pockets. Oh, yeah, snowshoeing or skiing. OK, maybe some overmitts. Cheap light nylon oughta do it though. Maybe that quick drying brushed nylon material from an old pair of light hiking short or pants, for some grip. For extra insulation or to dry them out you can also put a pair of you socks on over your wool mitts or gloves, or wear them instead of.