3M P100/OV Odor/Particulate Multi-Purpose Reusable Respirator 65021, NIOSH-APPROVED Organic Vapor Cartridge, Medium

I bought this for a month-long rotation as a medical student on forensic pathology. We observe several autopsies every day and depending on how long it took for the body to be found, the smell can be really overwhelming and intolerable. I wasn't sure how well this mask would realistically work to block out that kind of a smell, but the day I got it, I put it on and I tested it on my trash bin and even the dumpster downstairs. I couldn't smell anything.Then when I went into my rotation I discovered that the mask really worked perfectly--it went above and beyond what I had expected. I'm so grateful that I decided to buy this because it immeasurably improved my quality of life while on the forensics rotation.It's very easy to breathe through with no weird plastic smell. You get a bit of a red mark or indentation on your face after wearing it for a few hours, but this quickly goes away. The straps don't pinch or hurt at all. And both of the straps are adjustable so that you can ensure the mask fits your face perfectly, which is important to make sure that you have a complete seal over the nose and mouth.Make sure that you pay attention to the kind of filters that the mask has if you're looking to buy a similar sort of respirator. I bought this one specifically because it has filters tailored to organic solvents, which was suitable and appropriate for my work in the forensic autopsy rotation. But depending on what you're trying to filter out-- if it's particulate matter or asbestos-- you need to ensure that you're getting the right kind of filter. Not all of them protect against every substance equally. But, overall, for the price I would absolutely recommend it, regardless of if you're trying to protect yourself from a smell or some kind of heightened medical risk from exposure to particulate matter at work, it's really a great price for a device that works exceptionally well.