Review on MCWlaser Protective Goggles 190 540Nm Absorption by James Pfettscher

The most important feature is that they block 450nm light at low intensity (>50mW). The optical density is too low to observe the work during laser engraving. (They are for the cosmetics industry) They are of much better quality than the goggles that engravers come with. Caveats: I wear rather small frame glasses and they will NOT fit over them, I have no idea what frame the guy is in. carries a different rating. It doesn't look like the material the frames are made of will last long, but only time will tell. 4/5 stars. I would give 5 stars if they offered higher optical density.