The children's helmet consists on ABS outer shell, an EPS inner shell, and a cushioned sponge inner shell. The combination oBS shell and high-density EPS ensures a sturdy and durable structure with eent damping and shock absorption performance. The built-in detachable sponge pad provides a clean and comfortable user experience. This slip provided comprehensive protection for his son's safety and well-being. This ensures a comfortable and cool environment, including during intense activities. This helmet weighs only 363g, restoring pressure to the head and ensuring lighess and comfort. Allow your child to enjoy their activities without discomfort or restrictions. The helmet shirts on both sides feature Alanico shaped heads that can be worn according to the size on individual's head, providing a safe and comfortable wearing experience. Partially equipped with USTE crank dial The back of the helmet can be easily resized to accommodate different circumferences of the head, ensuring a perfect UDE for people with different head sizes. one two three