Controlled air-ﬂow design provides protection against fogging of the lenses, hence improving visibility. Highly curved lenses shaped around the face. This affords better eye protection from drafts and the cold and improves visibility.
The combination of a hard frame, soft forehead rest and nose pad improves the comfort and ﬁt of the glasses.
Articulated side pieces for adjustment of the angle of inclination optimize the ﬁ t of the glasses: The glasses can be tilted towards the forehead to stop drafts. Or they can be tilted away from the forehead for better ventilation and freedom from fogging.