Sofytouch safety glasses. lens: polycarbonate, colorless, curvature 5, standards en 166 - en 170. 1bt 9 ce marking. anti-striped, anti-fogging. front mount pvc, marked en 166 3 4 9 bt ce. weight 110g. for mechanical work in closed places with good visibility conditions. compatible with the use of prescription glasses and anti-dust masks, excellent comfort.