SIZE: Medium 53cm to 58cm

• ABS shell resists impact and high quality EPS foam provides shock-absorbing. Complies with U.S. Consumer Product Safety Commission Safety Standard for Bicycle Helmets for Persons Age 5 and Older.

• 11 top and side vents keep user cool and comfortable.

• Suitable for various outdoor sports such as cycling, skateboarding and so on.

• Fully adjustable, provided by the crank adjustment dial, 2 sets of pads with different thickness, and length-adjustable chin straps