Karam PN 521 Blue Ratchet Type Safety Helmet with Plastic Cradle is made up of specially formulated polymer. This ratchet-type safety helmet is equipped with triple corrugation for enhanced strength. The device is provided with side slots for fitting face and hearing protection accessories. Some of the additional accessories of the Karam PN 521 Helmet include an adjustable chin strap, ratchet type adjustment, etc. The headband is made of non-irritant and soft fabric to provide extra comfort to the user. The 4-point attachment cradle inside the shell has a unique angular placement to provide optimum shock absorption..