Not worth it
Definitely not fog free for 48 hours. I was excited to receive these & the material of the cloth was nice. It has an odd odor to it which I did not like. Unfortunately the product does not meet what is promised. It cleans my lenses very well & was able to have fog free glasses for a short period of time & after that my glasses were foggy a few hours later (maybe 1-2). I followed instructions just as advised also. Wish I could return and get my money back but I already threw one cloth away.
Rating: 1 stars