The main reason to use the aero style helmet is the lack of vents.
This time of year there are lots of little flying critters in the air and I seem to catch most of them in the airvents of my helmet - and an angry wasp can be very distracting - just ask Lance.
ok, I read this yesterday and thought it was a little funny. Last night, I get home after a group ride, look in the mirror AND THERE"S A BUG IN MY HAIR! A big, ugly critter, too.
Where can I get a deal on an aero helmet? I like the new Rudy Project.