The Trek Circuit Road Helmet makes for a very lightweight piece of protection while you’re on the road. Not only does it protect your head, it also performs while you’re riding. It features 21 CFD software-enhanced vents, which provide air flow and ventilation. It also features premium wicking fit pads. The ZipTite 2 Elite Fit System makes sure the helmet stays on tight. 1$ of each Trek helmet sold will also be donated to bicycle friendly communities, as part of Trek’s 1 World 2 Wheels commitment. You can purchase the Trek Circuit Road Helmet at the Trek online shop for $109.99.