3 sizes available and suggestion: S for toddler / kid, M for youth / adult, L for adult. Please choose the helmet size according to the head circumference.

Strong ABS shell resists impact and high quality EPS foam provides shock-absorbing. Complies with the U.S. CPSC and ASTM Safety Standard.

13 stylish vents, more ventilative and more aerodynamic, reduce sweating , keep user cool and comfortable.

Suitable for various outdoor sports such as skateboarding, biking, skate, scooter, rollerblade, hoverboard, longboard and so on. Various colors for baby, boy, girl, child, teen, men and women.

Fully adjustable for a custom fit, provided by the crank adjustment dial, 2 sets of pads with different thickness, and length-adjustable chin straps.

Complies with U.S. Consumer Product Safety Commission Safety Standard for Bicycle Helmets for Persons Age 5 and Older.