Using this Raskullz Lady Bug Toddler Helmet is easy. First, adjust the nylon straps to fit your child's head size between 48 - 52 cm. Make sure the helmet sits comfortably on the head. When your child is out riding or doing other activities, the helmet will protect their head thanks to the shock - absorbing inner shell. Remember to check the helmet regularly for any signs of damage. If it gets dirty, you can gently wipe it with a damp cloth. Don't expose the helmet to extreme heat or sharp objects, as this could affect its safety and appearance. With proper use and care, this helmet will keep your little one safe and happy for a long time.