Full Brim Unvented Hard Hat from Pro Safety. Features lightweight and durable ABS shell, unvented for situations where full head closure is required, 6 point ratchet harness, replaceable cotton sweatband to prevent perspiration build-up, full brim extends coverage to over the neck and ears, slightly shorter front peak allowing for good upward vision. Fits all head sizes: 53cm - 66cm. Certified to AS/NZS 1801:1997 Occupational Protective Helmets.