Perfect for surgery
Wear these during surgery and haven't had any issue with fogging; my eyes are protected from body fluids (blood, mucous, tissue, pus.) Much better than the disposable masks or cheaper glasses that tend to fog up frequently.

Very comfortable!
I bought these based on the two reviews on here that said they were very comfortable. I have to completely agree, I wear these for a full workday and hardly notice them - I've even ended up driving home still wearing them because I forgot they were on. They are by far the most comfortable safety glasses I've ever worn. Great product.

Surprisingly good
Although they don't look it, they're very comfortable (multiple days of 8+ hours without even noticing they were on my face). They don't seem to scratch very easily and only fog a little (when combined with an arguably inferior respirator).

Excellent Glasses
While I have not tested the glasses to impact, they are very light weight and comfortable. Unlike many safety glasses, you can work for many hours and not notice these or worry about fog issues. As a bonus, they have a trendy look and come packaged very well.