3MSemi-Permanent Lens Protector FF-400-17, Pack of 5

I still have the first sheet on & its been a long time. I don't use it alot but it's a life saver. My uncle died of cancer he would say his working around fine powder was the cause. I know the film saves your vision & protects you & your mask from blind spots the scratches on the shield could receive.

Just one of these lasted me for several months, and I wear the FF-400 mask about 20 hrs/day.It's stayed attached to the mask, even though I've sprayed it many times with lens cleaning fluid.I'm wearing it at home for protection from allergies, though - not using it for any rough work.The FF-400 respirator is designed for painting, and these lens protectors have Scotchguard on them because of that.If you are wearing the FF-400 while doing work that would quickly damage a lens protector, you might want to use the cheaper disposable lens protectors, FF-400-15.I gave it 4 stars rather than 5 because it would be better to have a respirator with a scratch-resistant lens, so that lens protectors would be necessary only for rough work.

Love how easy it is to use. Don’t like how short period of time it lasts. It has already messed up my face mask I spent $300 plus dollars on.

Way WAY too expensive. That being said the product works great. I didn't realize the respirator came with one or I might not have bought the extras. The product works great, keeps my respirator lens clean and like many have said these things are more "semi-permanent" than they are disposable. You really only need one and a back up so to speak but they work very well.

These adhere all the way around the perimeter, sealing out any dust and crap and protecting the lens on your expensive mask. There is a cheaper one I tried out that only sticks on the left and right side. The dust got in and scratched my lens. Wish I kept using these.

After 2 weeks of continuous use, sanding and painting the first one I put on and doesn't have a scratch. I've scrubbed with a rag primer particles off it two times too still no scratches. I haven't washed the mask with water yet, but I'd image if you didn't submerge, it would stay on. I took my time applying it making a tight seal along the adhesion strip. No dust particles have gotten behind it like others have said.

Adheres to the mask very well, paint overspray cleans up easily. Everyone was complaining about the price, but I found it reasonable since they came as a multi pack.

Just wipe it clean with some alcohol after painting and it comes clean. These should last a very long time.

Super durable! I haven’t needed to replace the first protector yet in months of intermittent use.

Spray foam insulation had made a mess of the last one and the new shields are great. I just wish the choices were clearer shen shopping about how many are in a package so I know what I am buying.