The O'Neal Sierra has taken the original O'Neal Sierra design and improved it in every way. The all new O'Neal Sierra RS is a step up from the outgoing design, offering a safer and better looking helmet with additional features while maintainng a competetive price point. Exceptional value for a class leading helmet!Features:Optimized air circulation thanks to various closable vents and internal ventilation channelsReady for Quin Smart Safety Sensor InstallationEasy and quick cheek pad removal with E.Q.R.S. system with emergency strapsSecure fit thanks to the Microlock chin strap closurePadded comfort liner, removable, sweat absorbing and washableBluetooth Ready with internal speaker cavities and rubber hoop at back of the helmet (Bluetooth unit not included)Extra-wide field of vision for maximum awareness in challenging terrain and enhanced safety on long rides both on and off the road.Pinlock® MaxVision fog resistant insert lens included in the box - needs mountingPerfect all-weather vision with clear Visor plus secondary integrated sun visorMeets DOT and ECE 22.06 safety standardsOuter shell: 74% ABS, 26% EPS; Padding: 100% PU foam; Lining: 85% polyester, 15% spandexProduct TypeHelmetsDisciplineDualsportColourBlackSizeMediumGenderAdultModelSierra