Update: I got the Smith Knowledge OTG Turbo Fan goggles, and they work
fine. Most of the time, the fan hasn't been needed yet, but when I'm
working hard and going downwind, it avoids even a hint of fogging.

The RC36 lens is $20 cheaper than the mirrored ones, and easier to
care for. Either way, also get an extra lens (Clear) if you'll be
riding any time other than in bright sun.

--- In ez3usx@yahoogroups.com, "Jim Strasma" <jimstrasma@...> wrote:
>
> While riding in the low 30 degree weather late this afternoon with
> lots of wind, I needed the protection of my best balaclava, the
> neoprene one that mostly covers my nose and mouth. Its downside is
> that it funnels lots of moist air to my glasses, which promptly fog
> up. Since I was on a dedicated bike path, I just put away my glasses,
> but my eyesight isn't good enough to do that on roads.
>
> So, any solutions?
>
> I'm considering ski goggles, of which Smith makes one over the glasses
> model with a battery-powered "Turbo Fan" intended to minimize fogging,
> (http://smithsport.com/products/snowgoggle/turbocam_knowledgeturbo.html)
> but wonder if anyone has actually tried such a solution for winter
> biking, or if there might be better alternative ideas.
>