Get your kids excited to go ride and stay safe at the same time, with the super-cool Hornit Kids Helmet. Fun, bright, wacky or stealthy, theyre stylish as well as protective, including a built-in LED, making them something theyll want to wear.Removable soft foam to accommodate growth3-way adjustable chin strap and secure buckleFully adjustable ring adjusterIntegrated LED light - Slow flash, fast flash and constant flashLight powered by replaceable 2 x AG3 coin batteries11 air vents aids coolingSuitable for ages 3 years+EN1078 and CPSC testedSize (Head circumference) - S - 48-53cm (weight 340g) / M- 54-58cm (weight 370g)A great fitting helmet is essential for optimal protection, one thats snug with a well-aligned fit while being comfortable and secure. This is why the Hornit Kids Helmet features a fully adjustable ring adjuster, securing young riders helmets in place every time they ride. With a simple rotation of the rear dial, its super-easy to both tighten and loosen, achieving the perfect level of comfort and a firm fit. Then theres the 3-way adjustable chin strap and secure buckle, both ensuring their helmet remains in place over any terrain and as they tackle any obstacle in their path. Inside, the removable soft foam provides added size adjustment, offering further flexibility for size and fit during growing years. As they pick up the pace and gain confidence, eleven air vents keep air flowing to the head, keeping them cool and comfortable. Theres also a rear safety light built-in, catching the attention of other road users. Made from durable, weather-proof plastic, Hornit helmets protect your kids as they brave the rain, snow, and wind. From the youngest of balance-bikers taking their first adventures on two-wheels to older kids getting ever more confident in their riding, the Hornit Kids helmet ensures theyre safe and sound whenever or whoever they go.Size Guide:Small 48-53cm / Medium 54-58cmTop Tip: If your childs head measures 53.9cm we would strongly recommend you go for the S size. In our experience the S size will be a good fit. Dont be tempted to buy a helmet that they will grow into as it wont offer full protection. A 5 year olds head grows approximately 0.5cm in circumference in a year.