More vents, more better! I tend not to wear a helmet if it is hot out and miss that schoolage child feeling of the wind blowing through my hair. I bought a Giro Pneumo in 04 that I spent a butt load on because it was the top of the line Tour De France leader wearing helmet with so many vents it felt like I wasn't wearing anything. I still wear it but I probably should buy a new one since it is so old now. But I would want the same kind with tons of vents and vents usually mean pricey....so I deal.