Using the Bell Lil Ripper helmet is easy. First, choose the right size for your child's head (it fits heads between 45 - 51cm). Then, use the action fit system to adjust the helmet so it sits snugly on your child's head. The no - pinch side buckle makes it simple to fasten. When your child is riding, make sure the helmet is centered on their head and the straps are secure. Remember, availability, certification, color, and pricing may vary depending on where you are. If you're outside the USA, check with your local dealer. To maintain the helmet, keep it in a cool, dry place. Avoid exposing it to extreme heat or chemicals. If it gets dirty, you can gently wipe it with a damp cloth. Don't use abrasive cleaners as they might damage the helmet's surface. If the helmet has been in a crash, replace it right away, as it may not provide the same level of protection.