The Raskullz Bolt LED Green helmet has a light-up 3D fin hawk! Nine LED lights illuminate the rubber mohawk with a flashing sequence. The lights are activated by a button located on the back of the helmet and will automatically turn off if left on. The child size helmet is recommended for riders 5?C8 years old . but will fit anyone with a head measuring 50?C54 cm. Always take a head measurement. Head sizes and shapes can vary . even within an age range. Using a helmet that doesn’t fit can be dangerous. Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older.