The Know has a frame made of lightweight, flexible and durable grilamid and is suitable for almost any athletic effort.

The nose piece and rubber sideburns hold even when wet, so the glasses will stick to the nose when moving, regardless of rain or perspiration. Nylon lenses are treated with Ripel, for clear vision and easy cleaning.

Know the dimensions of the frame

Height: 51.5 mm Width: 135 mm Pin length (from hinge): 130 mm.