Cofra colorless combowall safety glasses. lens: material: polycarbonate. color: colorless. curvature: standards: en 166 - general standards. en 170 - uv filters. frame: front material: polycarbonate. temples material: polycarbonate + tpr. other details: weight: 42g. area of use: mechanical work in closed places with good visibility conditions. plus: multifunctional, brow protection with integrated indirect ventilation