Crews Law Over-The-Glasses Dielectric Safety Glasses feature an oversized frame design for giving a higher level of protection from side impacts. Gray polycarbonate, Duramass AF4 anti-scratch, single lens with 5 position ratchet action offers wider lens angle adjustment for excellent orbital seal. Anti-fog lens in rugged construction filters out 99.9% UV rays for added safety. Safety glasses also feature hybrid type, silver steel temple infused with black, soft TPR material for added grip and comfort. Glasses with 12% visible light transmission meet ANSI Z87 standards and are sold as 144 pairs per pack.