ABUS: A bicycle helmet is bulky and cumbersome? When you set eyes on the YOUN-I ACE, every arguement against head protection, which is indispensable in city traffic anyway, will be blown away. If safety is your priority, you'll love it. If you want to look good, that's just as true! Functional and service-proven design combined with stylish bike fashion.Technology: In-MouldWeight: S/M 270g M/L 300gAdjustment System: Zoom Evo AdultHeadring: Full ring (rubberized, 2k)Sizes: S/M 52-57cm M/L 58-61cmVents: 17Rearlight: Triangle LEDStandards: CE EN 1078Features: Removable visor