not recommended for heavy-duty work

The glasses are way too hard and inflexible to the plant areas and makes at first of wearing a slightly stubborn impression
Shortly after they set up the fogged in the central region
In the further course of work (serious Flex and cutting work) they fogged the whole field of vision, so that had to be eigestellt work and an orientation just by picking up the glasses was possible.

The glasses were worn in combination an absolutely tight-fitting half-mask.
Although the hard seal transition closes cleanly but gives little comfort.

Main conclusion:
is favorable here and not good from a manufacturer such as 3M I had expected more here.
Wear goggles must protect the eyes, does this also. But if I can not see anything because the glasses fog, which can be beneficial to the work safety unlikely.
Perhaps these glasses are in the laboratory using yes but better for heavy work she could not convince me.

I will here make no advertising but the competition with U makes your job a lot better here
the next is another ul .... nic