Bolle Contour CONTPSI safety glasses, clear lens. Lightweight design with an adjustable nose-bridge, non-slip TIPGRIP and excellent 180 degree clear field of vision. EN 166 option K : Resistance to surface damage by fine particles. EN 166 option N : Resistance to fog build-up. Risks relating to radiations - UV Protection - EN 170 - (2-1.2, 2C-1.2). Conforms to EN170 & EN166.