Using the Hornit Lid Kids Helmet is easy. First, adjust the ring adjuster to fit your child's head size. Then, use the three - way adjustable chin strap and secure the buckle tightly. Make sure the helmet sits evenly on the head. When it comes to maintenance, you can remove the soft foam and wash it gently with mild soap and water. Let it dry completely before putting it back in the helmet. Keep the helmet in a cool, dry place when not in use. Check the helmet regularly for any signs of damage, like cracks or loose parts. If you notice any, stop using it and replace it right away. Always ensure the rear safety light has fresh batteries for optimal visibility.