Mountain Bike Helmet with Back Light and Detachable Visor N683165

BREATHABLE: 22 air vents increase air circulation and reduce sweating to keep your head comfortable during cycling. PROTECTIVE & : Impact resistant PC is not easy to crack and high density EPS foam is buffered, which surely improve performance. ADJUSTABLE: Turn knob at back for proper fit, suggested head circumference is 22.4-24.4in. UV PROTECTIVE: Detachable goggles reduce harm of strong sunlight while your face and eyes from wind, sand and dust. SAFETY LIGHT: Built-in a back light with 3 modes for warning and in dark riding,includes on mode,fast flashing mode and slow flashing mode.