Mountain Bicycle Riding Helmet Protective Cycling Helmet

[Name]: Bicycle riding helmet
[Size]: free size, head circumference between 22-25inches, head width 7inches, head length 9inches, with adjuster knob, adjustable head circumference 
[Material]: Built-in insect-proof net lining, imported nylon webbing and PP material regulator

【Wind Tunnel】: 22 wind holes