Safety First, Always: The kids youth helmet features a durable PC shell, thick EPS foam, extended rear coverage, and in-molding construction for maximum protection, durability, and lightweight comfort 2 Sizes Available: 2 sizes cover a wide range of ages and head circumferences. S: 19.7"-22.4" (50-57 cm. ), suitable for kids youth 3-5/ 5-8/ 8-14; XS: 18.9"-20.5" (48-52 cm. ), suitable for infant/toddler 2-3 years old. Please choose the helmet size according to your kid's head circumference Customized Fit: Equipped with a 360º adjustable knob and adjustable side straps ensure a comfortable fit for various head shapes and sizes. Weighing just 290g (0.64 lbs), this ultra-lightweight kids bike helmet won’t weigh down your child’s neck Flashing LED Light: 3 lighting modes: steady flash, slow flash, fast flash. The LED light keeps your kids safe and visible in low-light conditions. 16 airflow vents with internal air channels and breathable foam offer maximum ventilation, perfect for hot summer rides Detachable Visor: The toddler and youth helmet has a removable visor for added sun and rain protection, as well as shielding the face in case of a crash. The visor is easy to install and remove Trusted Safety Standard: Our kids helmet complies with U.S. Consumer Product Safety Commission Safety Standard for Bicycle Helmets for persons aged 5 and older, ensuring maximum protection for your child