Giro Atmos II Cycling Helmet

The Atmos II Cycling Helmet by Giro provides legendary performance, style and comfort. It utilizes Giro's own Thermoformed SL Roll Cage reinforcement, a breakthrough in helmet architecture that allows greater ventilation without compromising a helmet's integrity. The compact shape offers matchless style, and features the sure feel of a Roc Loc 5 system that cradles your head comfortably and securely. It's no wonder the Atmos II continues to be a favorite with road, XC and cyclocross riders worldwide. The Thermoformed SL Roll Cage is an ultra light polycarbonate skeleton fused into a helmet's impact absorbing foam liner visible on the bridges between vents, this layer of armor acts like a second shell, enhancing structural support, impact dispersion and penetration resistance while allowing Giro to carve the biggest vents possible without compromising the helmet's strength or integrity Features In Mold construction which is a process that permanently fuses a light yet durable outer shell with the helmet's impact absorbing EPS foam liner, enhancing the strength of both parts this fusion process reinforces areas around vents and ribs, creating a one piece exoskeleton that allows the helmet to be lighter, more durable, and better ventilated than helmets with shells that are fastened or adhered to the liner The Roc Loc 5 system provides comfort, stability, adjustability and weight savings in addition to enhancing the fit and comfort of helmets, the Roc Loc 5 allows you to easily custom tune the fit tension and the fore aft tilt of the helmet in seconds using a single hand, and it's lighter than comparable systems too, making it the ultimate in skull hugging luxury Giro's proprietary Wind Tunnel Ventilation System combines 26 vents in the shell with exhaust channels within the belly of the helmet leading to the rear, providing optimal ventilation Weight: 6.7 oz190 g Sizes: S 20 21.7551 55 cm M 21.75 23.2555 59 cm L 23.25 24.7559 63 cm