Features1ADJUSTABLE: Turn the knob at the back for proper fit,the suggested head circumference is 22.8-24.4in. 2BREATHABLE: 8 air vents increase air circulation and reduce sweating to keep your head comfortable during Cycle. 3PROTECTIVE \u0026 SAFE: Impact resistant PC is not easy to crack and high density EPS foam is buffered, which surely improve safe performance. 4UV PROTECTIVE: Detachable magnetic visor reduces the harm of strong sunlight while protects your face and eyes from wind, sand and dust. 5RECHARGEABLE \u0026 IP65 WATERPROOF SAFETY LIGHT: Safety back light with a built-in 3.7v 200mAh rechargeable battery for warning and lighting in dark riding,and 3 lighting modes for your different demands,includes fast flashing mode,slow flashing mode andalways on mode. 6COMFORTABLE: Take down the detachable absorbent lining and detachable chin pad for easy cleaning,and a quick release buckle for easy taking off.SpecificationImpact resistant PC with high density EPS foam to protect your head from unexpected injury,detachable magnetic visor is UV protective to block out harmful sunlight,and the back light provide safety lighting for night riding.A nice bike helmet for your riding trip! Features:ADJUSTABLE: Turn the knob at the back for proper fit,the suggested head circumference is 22.8-24.4in. BREATHABLE: 8 air vents increase air circulation and reduce sweating to keep your head comfortable during Cycle. PROTECTIVE & SAFE: Impact resistant PC is not easy to crack and high density EPS foam is buffered, which surely improve safe performance. UV PROTECTIVE: Detachable magnetic visor reduces the harm of strong sunlight while protects your face and eyes from wind, sand and dust. RECHARGEABLE & IP65 WATERPROOF SAFETY LIGHT: Safety back light with a built-in 3.7v 200mAh rechargeable battery for warning and lighting in dark riding,and 3 lighting modes for your different demands,includes fast flashing mode,slow flashing mode andalways on mode. COMFORTABLE: Take down the detachable absorbent lining and detachable chin pad for easy cleaning,and a quick release buckle for easy taking off. Specification:Color: Black & White / Black & Red / Dark Grey & White / Blue & White / Silver & Red / White & Orange / Red & White (optional) Material: PC + EPS Air vents: 8 Battery: 1* 3.7V 200mAh 505025 Li-ion battery Head circumference: 58-62cm/22.8-24.4in Weight: Approx. 323.3g/11.4oz Package List:1* Bike Helmet 1* Detachable Visor 1* USB Cable NOTE: Item color displayed in photos may be showing slightly different on your computer monitor since monitors. Thank for your understanding.Package List1* Bike Helmet 1* Detachable Visor 1* USB Cable NOTE: Item color displayed in photos may be showing slightly different on your computer monitor since monitors. Thank for your understanding.