These Boll Safety SILEX Safety Glasses have smoke colour lenses. They are approved for permanent wear and certified with perfect optical quality. Designed and used for protection against UVA/UVB and solar radiation, 99.9% UVA/UVB protection. Specification: Lens Type: Smoke, Anti-fog and Anti-scratch Lens Conforms to: EN 1661F/EN 172-Solar 5-3.1 Frame Conforms to: EN 166FT The Boll Safety SILEX Safety Glasses have an ultra-wraparound frame with PC/TPR co-injected temples for greater comfort. The frames also incorporate FLEX 160 technology to ensure they fit every face perfectly. The wraparound fit provides a panoramic field of vision. The lenses have an anti-scratch, anti-fog coating.