SUNVP Adult Unisex Bike Helmet Integrated Ultralight Adjustable Safety Helmets for Bicycle Cycling BMX MTB Climbing Material: high density imported EPS,PC and PVC. The lining: silver velvet lining, high permeability,the original design of the tail to increase the driving streamlined. Size: L, suitable for Head circumference 22.05-24.80 inches(56-63 cm),Weight:0.53 lb With removable, protective pad liner and sweat chin pad, comfortable to wear and easy to wash. The removable black visor help to avoid foreign bodies and provide a shade for our eyes. The regulator can adjust size make the helmet be suitable for you, so as to feel no gap,play a better security role of the head