"I bought these a little while ago and have been very impressed. I do a lot of hacking off of renders so have fair size chunks of that flying about sometimes. They haven't scratched and don't fog up either. Only down side which is minor is that they are a bit difficult to wear with a dust mask (rubber with changeable filters type). But it is do-able. Overall very good googles, I also where them in winter when mountain biking, saves getting mud and grit in your eyes."