AGV K1 S Soleluna 2018 Helmet The AGV K1 S Helmet has an aerodynamic shape, ventilation scheme, and spoiler developed for the wind tunnel tested Corsa R and Pista GP R. The shell and spoiler provide aerodynamic stability at speed and the spoiler itself features a passive rear vent to extract warm air from the helmet as you ride. The K1 also incorporates the central air intake above the visor taken directly from MotoGP developed Pista GP R to provide best-in-class ventilation. Shell: HIR-TH (High Resistance Thermoplastic Resin) shell construction 2 shell sizes, 4 EPS sizes Shield: XQRS (X-tra Quick Release System) visor mechanism for tool-free removal and replacement of the face shield in seconds Scratch-resistant and anti-fog polycarbonate face shield 100 UV protection 2 shield sizes GT 2-1 for helmet sizes XS, SM and MD and GT 2 for sizes LG, XL and 2XL Micro-opening visor Ventilation: Integrated Ventilation System (IVS) was designed and optimized in a wind tunnel 5 front vents (3 at the forehead and 2 on the chin guard) 2 rear extractors vents built into spoiler Interior: Fully removable and washable 3D inner liner and cheek pads Liner and cheek pads are sanitized and made from Dry-Lex fabrics Safety: DOT approved ECE 22.06 certified Helmet profile contoured around the base to reduce the risk of collar bone injuries Double-D ring chin strap