Next Descent Anti Fog Spray for Swimming Goggles & Diving Mask Defog Solution for Pool, Snorkeling, Scuba and Freediving

I'd buy these again. Works really well for my swim goggles. Lasts a few swims usually if I just apply it and go swim, but if I let it dry and wait a bit, it lasts about a week. I want to try them on my helmet visor next.

My husband and I apply this twice per day while snorkeling. We prefer full mask snorkels - and I also use it when diving. Lasts a long time and provides great clarity under water

I got this my husband. He uses a mask and it kept fogging on him. I have goggles and spit works great for me, but not for him. He said it worked perfectly, no fogging for his whole time swimming. He highly recommends this product.

Works great for my swimming goggles

This seems to work, but I don’t know if I would consider it reliable. I found the instructions on the back of it to be a little bit inaccurate. I sprayed a bunch on various lenses and tested them out. I’m still getting a little bit of fog, but for the most part it does work. I was almost gonna return this, but it seems to do good enough of a job in a pinch. I think this it’s pretty good, but I’m not sure if there’s a better option out there. It does work, but depending on what you’re using it for you might have to reapply it often. What I found so far, is if you wipe it in and use a fair amount of it it works quite well. Don’t wash it off right away like the instructions. Tell you to do. Make sure to keep a fair amount on the inside of the lens without the lens getting gunked up and it seems to do a pretty good job. Overall, I’m happy with it, but it doesn’t work quite as well as I would like it too. Still, I think it’s better than nothing and it does help to stop the fog.. enough to be happy with I guess, but not entirely.