Using the Bell Sidetrack helmet is super easy. First, pick the right size for your child or youth. The Universal Child size fits heads between 47 - 54 cm, and the Universal Youth size fits 50 - 57 cm. Once you've got the right size, put the helmet on your head and use the Ergo Fit system. It's a dial that you can turn with one hand to make the helmet fit just right. The snap - in visor can be easily attached if your child wants some extra sun protection or a cooler look. When riding, always make sure the helmet sits level on the head and covers the top and back of the head well. As for maintenance, keep it clean by wiping it with a damp cloth. Don't use harsh chemicals as they might damage the helmet. And always store it in a cool, dry place. If the helmet ever takes a hard hit, it's time to replace it, even if there's no visible damage. This way, you can ensure your young rider is always safe on the bike.