Baseca Elastic Ultralight Mens Womens Road/Mountain Bike Helmet with 22 Vents Silk-light grade color EPS foam structure,effectively reduce the shock pressure,streamlined tail design. Tight binding/No gap,play a better security role of the head. With removable protective pad liner and soft sweat chin pad, comfortable to wear and easy to wash. The removable visor help to avoid foreign bodies and provide a shade for our eyes. The adjustment can make the helmet be suitable for you,head girth: 52-61cm, head width within 18cm.