I have been using the standard flip over wool mittens for years. I wear a pair of helly hansen polyproplene glove liners underneath and if need be I add some hand warmers to the mitten portion. This does well for me for the majority of the time. If required for colder and sitting for longer periodsI justadd a waist belt handwarmer with the above. If its extremely I break out the trapper mitts and wear the polypro liners underneath.