Light reactive lens lightens and darkens with changing outdoor light conditions: light to dark in less than 20 seconds, dark to light in less than 3 minutes. Features nylon brow, spring-hinged magnesium alloy temples and adjustable nosebridge. Polycarbonate lens absorbs 99.9% UV. Meets the High Impact requirements of ANSI Z87.1-2003. 5/Box.
Note: Safety directors should assess their particular workplace and make all Smart Lens wearers aware of the time required for the lens transition. Special care should be taken when moving from outdoors to indoors. Outdoor temperatures may affect lens transition time.