Bell 2016 Super 2R All-Mountain Bike Helmet Construction: Fusion In-Mold Polycarbonate Shell Certifications: CE EN1078, CPSC Bicycle Vents: 23 helmet vents, 4 brow ports, 6 chin bar vents Sizes: S 52?56cm, M 55?59cm, L 58?62cm Weight: 765g (1.687lbs)