David O'Harawrote a review of Celtek Chroma Mitten on January 3, 2013
So these mittens are pretty sweet. Kept me warm without a problem in about 28 degree weather. The wunder zips are pretty cool and convenient but I think that there should be a flap covering the inside of the zipper like there is on the outside because some cold air definitely does leak in. You can't really feel it when you are riding because you are moving around more but it would be nice if they were air tight on those cold lift rides. They got a little bit wet too. However I have the 2011 model and I think that these newer ones are more waterproof, so I wouldn't worry about it if you are getting these ones. Over all, freaking sweet mitts.