We purchased this for some very mild home renovations (specifically to use the product Vamoose which has a conversion odor while doing its job). I took a guess as to what filters we needed getting both the OV/P100 cartridge and the circle N100 pink circle filters. The cartridges turned out to be perfect. Not only could we not detect an iota of the Vamoose, but we couldn't smell or have any reaction to the very intense mold smell in the basement. I have serious allergies that are activated in outside air (potentially deadly) and these filters also protect my lungs when leaving the house. After wearing it so often it became clear there are all sorts of smells filtered, from bleach cleaners to skunk to normal household scents (which drive me nuts). We just left a hospital for a visit today and when my daughter took hers off she remarked she never really smelled how a hospital smells until she did. She smelled nothing and then the ambient air when she took the mask off which hit her pretty hard.
So not only would we buy this again, we did (and plan on buying two more).
That said, this isn't a perfect mask. you have to cinch it to some degree of tightness. There is a seal test (two) you can use which are pretty good. I cinch less tightly if I am just going outside versus more tightly if I'm going in the basement or using a serious chemical. I get about 2 hours before my nose bridge starts to hurt and four before that mask absolutely has to come off (we measured today in the hospital). If you wear the mask for long periods day after day it will start to cause some temporary damage to your skin (abraising the skin, causing swelling). I usually take it on and off as I go in and out of the house so I think those little breaks make a big difference because I can wear it for 4-6 hours in a day with these breaks without super cinching. (I will be dead serious though, when you work with key chemicals don't skimp on the cinch).
If I had to go back in time and purchase I might have tried the full mask instead of the half mask. My big concern is that a full mask would not account for my glasses and my glasses sit on these with ease. (we are also able to wear goggles).
If you are wearing this for covid protection, the thing you have to keep in mind is that the thing that makes it easy to breathe is the exhalation valve and that does NOT have a filter on it. We put a blue surgical mask over the exhalation filter if we are going around others but it definitely isn't the greatest solution so I recommend really working to find a good mask solution for the exhalation filter.
