Giro Advantage 2 Road Bike Helmet In-Mold construction reinforces the area around the vents and ribs, creating a one-piece exoskeleton, which allows the helmet to be lighter, more durable and better ventilated than traditional designs 5 Wind Tunnel vents with internal channels thrust cool, fresh air over and around your head while forcing heat and stale air out Quite possibly the best-fitting retention system you've ever experienced, the Roc Loc 5 easily adjusts both fit tension and vertical position with a single hand, plus it's 40% lighter than its popular predecessor, Roc Loc 4 Includes waterslide graphics Certified CPSC