Helmets related to the safety of construction workers, even in times of danger can save people's lives, so we have a thorough understanding of the structure and function of fiberglass helmet to the best use, to play its due role. Cap shell to withstand the blow, to avoid falling objects hit the human body. Cushion: when shocks occur, reducing the impact. Fiberglass helmet hat hoop: to keep the helmet on his head a certain location. After the hoop: headband locking device. Chin strap: fixed helmet head combined with stable to prevent falling sweatband: absorbent. Top band: Distributed impact, keeping the cap shell floating, http://www.botongdianli.net/