Using this helmet is easy. Just adjust the grow flex fit system to get the right size for your child's head. Put it on like you would any other helmet, making sure it sits snugly. Remember, always check the magnetic buckle to ensure it's securely fastened before your child starts any activity. When it comes to maintenance, you can wipe the shell with a damp cloth to keep it clean. Don't use harsh chemicals as they might damage the helmet. Also, store it in a cool, dry place when not in use. If the helmet is ever involved in a serious impact, replace it right away for your child's safety.