I wear this one, a Bell Faction Mirra. I bought it for something like $6 on closeout at a Dick's. I actually bought it to wear when I ride my cruiser... But I start using it on my road bikes around this time of year; it's warmer

It's CPSC bicycle standard certified, and to be honest, I bet would protect my head a whole lot better than my airy road bike helmet. I recall reading an article about very veltilated helmets that stated they have to have stiffer styrofoam because there's less of it. Not as cushioning.

Dunno, I actually like wearing the BMX helmet. Another bonus? I don't get weird cycling-helmet helmethead from all the vents. You know what I mean. Lumpy helmethead.