Originally Posted by
cyccommute
I've looked at both the Bern and ski helmets and thought they were a good idea until I realized that mounting a helmet light to one would be very difficult.
Ski helmets also suffer from being
too warm. While they would be nice for a 20 degree commute, they would be way too hot when the temperature rises to 40, 50, 60 or even 70

which is always a possibility around here.
I'm sporting a bern right now with the winter kit, and cyccommute is correct, they are great from 20F on down and too hot for anything over 2-3 miles at 30F. However, they do come with a summer band that is just for sweat, and the visor is also an option but you have to order it direct from bern by calling them (at least I had to a month ago). No where to mount a light unles you velcro, not adjustable, but does have the indents and a goggle keeper clip on the back.
If I had to do it all over again I would have bought a regular bicycle helmet and a good buff. Much easier to adapt to the variable conditions that way. We get some mornings in the 20s and afternoons are in the 40s. The different kits just snap in but for real cold you need a neck gator anyway.