I work in chemistry and have very sensitive eyes which made me more or less forces you to wear a tinted goggles. I have them every day about 8 hours on the nose and have to say that this is my opinion the best TINTED goggles. You never really gets fogged only if the spectacle is very cold and I then get in a very warm room they fogged for about 20 seconds. But what is not a problem for me. The comfort is fantsatisch and has several settings options. The tönnung I think is the right place because I work in a Gebauede it darkens everything around from, but one has to recognize something no problem under normal lighting conditions.