JOLIN Children Protective Warm Bicycling Motorcross Shakeproof Kids Helmets with HD Windscreen Super impact-resistant ABS shell with EPS foam and comfortable liner Clear Anti-fog,windproof and dustproof visor ,with adjustable chin pad Security and quality assurance Free size ,fit for kids whoes head circumstance is not more than 55cm Suitable for versatile outdoor sports,Motorcycling ,Bicycling ,Snowboarding etc