Get fogged up a little too easy for me
593518
For an inexpensive pair of safety glasses, they do the trick. Get fogged up a little too easy for me, but they fit and are durable.
1153812
I bike as my main mode of transportation, and I live in Minnesota, where the winters are frigid. I needed something to keep my face from freezing. One Size Fits All (but not properly) would be more apt. The mouth holes were on my chin when my eyes were lined up, and when the mouth was lined up, the mask was in my eyes. I ended up grabbing a pair of scissors and modifying it by cutting the nose slot so it would work a little better and the eye slot lower so I can breath in it, but I still struggle because I wear glasses, and more often than not my breath would come out through the eye slot and fog up my glasses. I found a way to make it work, and I don't bike terribly far, so it is fine for me. I would urge others to seek this out in a physical store and see if they can try one on before buying.
2254362
I didn't expect much from goggles, a lot of them at this price are the same. It worked for what I needed it for, a chemistry class, and worked well. However, I don't think the vents are big enough. I'm a bigger person and I will admit I sweat a bit. Fogging up is kind of annoying for me and these goggles do not help.

For me, they did not hurt to wear.
1953435
I read great reviews about these goggles, but they have so far just been ok for me. I bought them to use riding my bike to shield my eyes from the wind. I typically place them over a balaclava or simply across my eyes with a beanie on. On the beanie days (less cold), these work great. They keep the wind and random road debris out of my eyes and are easy enough to slip on and off. But on the days when my mouth and nose are covered, they tend to fog up when I am sitting still. When I'm riding, the wind clears them right up, but if I have to stop at a red light, they fog up to a point at which I don't feel safe taking off into traffic unless I take them off my face or wipe them off while I'm stopped.

Most of the year, these will be good, cheap goggles for the bike, but for the winter months, I was really expecting more. I don't like the idea of having two sets of goggles, so I suppose I'll just keep wiping them off.

For what it's worth, the point at which the frames attach to the lenses swivel up and down in a type of ball-and-socket joint. The goggles make a clicking sound when they are moved. When I pulled these out of my bike bag without looking, and heard what I thought was cracking, I thought I had broken them. It turns out I had just rotated one side of the frame upward about 30 degrees. I clicked it back into place without any trouble. I'm not sure what the use of this feature is, but it's worth mentioning.
128664
Well, I have glasses and the circulation of the air I breath out makes my glasses foggy when I run. This is a bit annoying. But in terms of keeping you warm it does a good job.
4747961
When I first got these they worked great. After a month they get foggy after 2 laps. I will keep using them but it's pretty annoying. The plus is they are comfortable.
4309991
Well, I can't say much about the anti-fog. Perhaps it was because it was 20 degrees F on the day I was outside working under the porch for a few hours but they did fog and actually built up so much condensation that it was dripping down my face. I wiped them clean and put them on again only to have the same effect within 5 minutes. Maybe in a more normal temp they may perform closer to what it's supposed to do but definitely NOT in freezing weather.

The positive is that they fit well, the elastic band is wide enough to be more comfy than the thinner cheaper ones. The liner was harder than expected though, felt like a stiff strip of silicone with barely any cushion to it. I'm pretty torn about keeping these considering I am comparing them to those typical chemistry goggle type ones that's been around for years.
3138231
Screen is much easier to see, eyepiece is luxurious, only problem is that the glass fogs up from your face. Back away for a sec and you're fine.
2710165
Good goggles, but hard to keep them from fogging up, had to use a stinky anti-fogging spray way too much.
2578110
Everything is good except that it does fog up.
1058031
Ok, googles, not great, they make you a little dizzy because of double vision, but can get used to them. Good seal and no fog. Ok, but there are better in my opinion.
4448352
I like the fit and tint of these goggles but after the third time I wore them they got foggy.  I swim usually 30-60 mins at a time and then rinse and hang them dry per the directions, yet they still got foggy.  I'm pretty disappointed :(
426111
I didn't have too many problems with mine.  I liked it and it worked well, but my wife had issues with water getting inside the mask and fogging up quite easily
1610039
Very comfortable pair of of goggles. Venting is very nice but they can still fog up. Fog spray is still needed. There are cheaper goggels out there that actually prevent fogging better than these
4677869
It didn't seal well and fogged up my glasses and face shield. I pulled it down under my nose and it kept my neck warm and stopped fogging up my shield
2661796
These look really cool but they do fog up considerably more than my $5 student store goggles. I do use anti fog inside of both though I have had to use it more than once in one sitting when using these.
1042852
Was able to do some swimming/snorkeling with these and it was great.  They get foggy easily (as most goggles will) just apply anti-fog.