ELVEX OVR-Spec III SG 57 Safety Spectacles with polycarbonate lens. Ultra-lightweight weighing in at only 1 ounce (32 grams), this OVR-Spec (over specs) easily fits over most small & medium sized prescription eyewear of up to 144 mm. . Adjustable length drop temples “hook’ behind the ears prevents slipping during work activity for added protection. The unique frame design maintains a space between expensive prescription and safety lenses preventing rubbing and scratching. Ballistic Vo Rated & High Velocity Impact Resistant 100% UV Protection Complies with ANSI Z87.1-2010 (+) & CE-EN-166.