Cabela's has some handlebar mittens made for ATvs and Snowmobiles, but they look like a great option for cyclists who also venture out into the cold weather. These mittens fit over the handlebars to allow easy access to controls while protecting your hands from cold weather and brush.

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These can be found for $12-25, depending on the season. This is the cheapest option I've found when it comes to pogies.
Buy: www.cabelas.com