Low profile, "toric" lens fits under welding helmets, on hard hats and with most respirators. Polypropylene frame with soft elastomer seals and conforms to most facial contours for a secure and comfortable fit. Lens has Uvextreme AF anti-fog coating. Indirect ventilation system channels and directs airflow over the lens to minimize fogging and improve vision. Gray or clear lenses. Easy lens replacement system. Made in USA. Meets ANSI Z87+ and CSA Z94.3 standards. EA