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"Designed with cooling vents for improved air circulation. Lightweight, polyethylene shell works with the 4- or 6-point Fas-Trac« ratchet suspension for a complete protective system. Lateral contours above the ear provide easy integration of hearing protection. GlaregardÃ- under the brim reduces reflective glare. Meets ANSI Z89.1-2003, Type I, Class C."