ROLL CAGE REINFORCEMENT — Roll Cage is a light-yet-tough web of reinforcement invisibly moIded inside a helmet's EPS foam liner. It helps the helmet to hold together under impact, and provides an extra measure of strength and integrity that you'll never notice. WIND TUNNEL VENTILATION — Giro helmets are developed utilizing our proprietary Wind Tunnel ventilation system. This elaborate design combines active vents in the helmet's shell with exhaust channels inside the helmet that thrust fresh, cool air over and around the rider's head while forcing heat and stale air out. It's the most effective cooling system available, and a difference you can feel every time you ride. ROC LOC 5 AIR MIPS FIT SYSTEM — In addition to helping to optimize stability and cooling airflow through the helmet, the micro-adjustable ergonomic and compact dial allows riders to adjust vertical positioning and tune the contact points independently for a customized fit with exceptional comfort. IONIC+ PADDING — Pure Silver is the secret ingredient that gives IONIC+ the power to provide natural, permanent odor protection to keep your helmet feeling fresh. ROC LOC 5 AIR FIT SYSTEM — In addition to helping to optimize stability and cooling airflow through the helmet, the micro-adjustable ergonomic and compact dial allows riders to adjust vertical positioning and tune the contact points independently for a customized fit with exceptional comfort. Enthusiast road and gravel riders deserve pro-level performance and Cielo delivers the style, features, and comfort that set Giro ahead of the bunch. Inspired by Aries, with nods to iconic models like Aeon, Cielo's compact design houses maximizes cooling performance with 22 vents tied to deep internal channeling, while integrated protection from Mips Evolve Core combines with our top-tier Roc Loc 5 Air fit system. For performance, protection and style that stands out from the pack, step up to Cielo.