It isn't as well ventilated as a road helmet but I'm about to replace my current commuting lid with one of these - the Bell Muni / Arella (women's version). As cycling is my main mode of transport, I tend to commute in my everyday clothes, especially when on my Brompton, and prefer a more low-key look. This won't break the bank either. Here's the link if you're interested http://www.youtube.com/watch?v=zz9zCNzL9ts