real quick, I'm aware my 3M respirator doesn't have a filter for the exhalation valve I bought it a couple of years back for wildfires, because bits of ash were falling on my car and surroundings from a nearby wildfire. For awhile it was my only p100 option. so I saved up and got a Forged Air respirator (99PFE Filters) and now my 3M is for cleaning and future wildfires 👍️