Keep your child?s noggin safe while scooting with our upgraded Micro Helmets! Available with safe sizing via head circumference, you can be sure that your Micro helmet will be the perfect fit for your little one. Our helmets also come with removable inner fleece padding to ensure a fit that feels just right as children grow. Upgraded materials and construction include an in-moulded PC shell, adjustable side-locking dividers, magnetic buckle, and a helmet-adjusting spin dial with built-in LED light for added visibility while scooting. Also safe for biking, you can be sure that your Micro Helmet will go the distance, and last through your favorite outdoor activities. Say goodbye to hot, itchy heads while outside! Our helmets have 8 air vents to keep heads cool. Extra Small: 46 - 50 cm (about 18.1 to 19.6 inches) New Micro helmet styles, featuring upgraded technology: In-moulded PC shell; 8 air vents to keep heads cool; Adjustable side-locking dividers; Magnetic buckle; Removable inner fleece padding; Spin dial with built-in LED light;.