Protection level / tint of the disc: 2C-1.2 (transparent glasses with protection against ultraviolet rays, non-tinted, with improved color perception)
Optical class: 1 (highest optical grade, for continuous use)
Mechanical resistance of glasses: F (protects against particle impact with low energy)
Resistance of the glasses against surface damage by fine particles: T
I use the glasses outdoors and indoors for DIY - hedge trimmer, brush cutter, weedkiller spraying, sawing, drilling, ... for I think it suited just fine.
I can well see through the glasses, the picture is only slightly distorted. It covers my eyes from full and is pretty good at the face.
You can adjust the tilt of the Schei Bung (by the Up / Down Click the bracket) and the length of the strap (the rear part can pull out). You can adjust the glasses so the own head quite passable. Despite the adjustment affects the glasses in the seat with me a little slack, however it does not slip, so sitting extent already determined.
All in one for my for purpose of a good, suitable and adequate safety goggles. I am happy.