Giro Atmos Road/Racing Bike Helmet (Large, Matte Titanium) High-performance, technically-advanced helmet is well suited to road, 'cross, and cross country use Proprietary Wind Tunnel ventilation system combines active vents with internal exhaust channels that thrust fresh air over and around rider's head, while forcing heat and stale air out In-mold construction process fuses helmets outer shell with its impact-absorbing EPS liner during molding process, making liner part of the helmet Innovative Roc Lock fit system provides outstanding comfort, stability, adjustability, and weight savings; easily dial-in both fit tension and adjust vertical position with single hand Includes limited lifetime manufacturer's warranty