Impact resistant PCwith high density EPS foam to protect your head from unexpected injury; detachable 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 22.4-24.4in. BREATHABLE: 22 air vents increase air circulation and reduce sweating to keep your head comfortable during cycling. 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 goggles reduce the harm of strong sunlight while protect your face and eyes from wind, sand and dust. SAFETY LIGHT: Built-in a back light with 3 modes for warning and lighting in darkriding,includes always on mode,fast flashing mode and slow flashing mode. COMFORTABLE: Take down the absorbent lining and soft chin pad for cleaning and a quick release buckle for easy take off. Specification: Color: Black & white / Red & grey / Silver & grey / Silver & red (optional) Material: PC + EPS Air vents: 22 Head circumference: 57-62cm / 22.4-24.4in Battery: 1* 3.0V 130 mAh CR1632 battery Weight: 281 g / 9.9 oz Package weight: approx. 349 g / 13 oz Package List: 1* Bike Helmet 1* Detachable Goggles NOTE:Item color displayed in photos may be showing slightly different on your computer monitor since monitors. Thank for your understanding.