Using the helmet is easy. First, adjust the head basket according to your child's head size. The self - adjusting KidFit system will do most of the work to ensure a snug fit. To put on the helmet, use the side buckle. Make sure it's not too tight or too loose. For visibility, you can attach the Universal Lazer LED at the rear. When riding, the insect net will keep bugs from bothering your child. As your child grows, you can expand the adjustable head basket. When it comes to maintenance, use a soft, damp cloth to clean the helmet. Avoid using harsh chemicals as they might damage the helmet. Check the helmet regularly for any signs of wear and tear, especially the buckle and the KidFit system. If there's any damage, replace the helmet right away to keep your child safe.