Originally Posted by newbojeff
I had a costco special for a while then a low end Giro. My wife bought me a Bell Sweep as a present. It is expensive, but is light (not that critical), has tons of venting (critical), and fits great. It is my first helmet without a visor, but it fit on my nogin way better than the high end Giro that could have a visor. So far I have not actually noticed a difference when riding in the rain without a visor.
Mostly I like the visor for the windcut affect.
Basically, I wear contacts and they dry out very fast if I'm moving at any good speed. With no helmet its horrible. With a helmet with no visor its the same, but on a road bike with a visor it cuts the wind 'just' slightly enough where it isnt very much of a problem.