PROTECTIVE & SAFE: Impact resistant PC hard shell is not easy to crack and high density EPS foam is buffered, which surely improve safe performance.RECHARGEABLE SAFETY LIGHT: Safety back light for warning and lighting in dark riding,and 3 lighting modes for your different demands,includes fast flashing mode,slow flashing mode and  always on mode.BREATHABLE: 21 air vents increase air circulation and reduce sweating to keep your head comfortable during cycling.COMFORTABLE: Take down the detachable absorbent lining and detachable chin pad for easy cleaning,and a quick release buckle for easy taking off.ADJUSTABLE: Turn the adjustable dial at the back for proper fit,the suggested head circumference is 50-60cm/19.7-23.6in.Color:GreenModel Number:366GR