The Submerge does exactly what is says on the tin and, like the Polaris Dry Grip and Sealskinz Winter Technical Glove, you can immerse your hand in water up to the cuff, but while the outer saturates, the inner stays dry thanks to a layer of breathable, waterproof Hipora. Fit is much closer than the Polaris or Sealskinz and the layers don't slide uncertainly over one another when you're gripping the shoulders of drop bars. In terms of warmth, Specialized say that they're good to 0ºC, and having tested them in conditions a couple of degrees above, I'd agree.
The thick gel pad over the ulnar area is more comfortable than the ribbed gel pads on many of Specialized's other gloves. A rubber palm also provides good grip. It's a shame that the Velcro-fastened cuff isn't longer and that there are no reflectives. Another oddity is the fact that the first time I used them the inner exuded a strange smell, but this faded with washing. In all, this is a good glove for mountain biking. For winter road use, I'd prefer Specialized's dearer Radiant, though.