Using your Hornit Lid Kids Helmet is easy. First, adjust the ring adjuster at the back to fit your child's head size. Then, use the three - way adjustable chin strap to secure it under the chin and fasten the buckle. Make sure it's snug but not too tight. When your child is out riding, the helmet will keep them safe, and the rear safety light will make them more visible, especially in low - light conditions. After each use, check the helmet for any signs of damage, like cracks or loose parts. If the soft foam gets dirty, you can remove it and wash it gently. Store the helmet in a cool, dry place when not in use to make it last longer.