Giro Pneumo Road Bicycle Helmet Exclusive. A paragon of high performance excellence, the Giro Pneumo delivers everything you expect in a well designed road Bicycle Helmet. Structurally, its In Mold construction with a Roll Cage is shaved, sculpted, and tuned to ensure the optimal balance of lightweight strength. There are 19 Wind Tunnel vents carved into the shell for exceptional cooling without compromising structural integrity. Additionally, the Pneumo sports the superb Roc Loc 5 fit system, featherweight webbing with retainer, and an ultra light buckle to complete the package.