Adjustable Ventilation And Adjustable Toddler Bike Helmet For, And White Bike. ?Kids Helmet for Multi-Sports ?Intended for?3-8 years old kids| Size: 18.9-21.3 inch (48cm-54cm)| Color:Black, Blue,Pink, Red, Green. Adjustable toddler helmet size to accompany kids' growth, It is a perfect gift for boys and girls. ?High Quality Durable Material?Our kids helmet is made of ABS and shock-absorbing EPS foam, Constitute multiple protection system, specially designed for multiple-sports head protection. ?Adjustment-Comfortable?This kids bike helmet has a special adjustment dial system adjustable straps to ensure your children achieve a perfect and safe fit. And 11 individual air vents that will keep your kids Cool Comfortable for fun when playing. ?Safe and Reliable?Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 1 and Older (Extended Head Coverage?,this toddler bike helmet can provide professional protection to your children, make them play safely and happily. ?30 Days No Risk To Buy?We offer 30 days return policy and 24 hours' friendly customer service.If you have any questions about our kids bike helmet, please let us know, we will help you until the problem is solved.