BASE CAMPUpgrade M Plus Dust Mask 2 Pack, Breathable Reusable Dust Face Mask with 6 Activated Carbon Filters for Woodworking Construction Mowing Grinding

I am impressed by the product’s value for money. I recently tested it out for work purposes. As someone with severe allergies, I utilized it for its protective capabilities. It effectively shielded me throughout the day, and I felt a significant improvement in my well-being.One aspect that I found slightly irritating was the back strap. While it provided a snug fit initially, it became somewhat irritating after repeated head movements. I adjusted the strap to strike a balance between snugness and looseness, allowing for some movement. It is possible that this is a personal preference, but it was the only minor issue I encountered.Overall, I am highly satisfied with the product’s quality in terms of dust protection. Although it was slightly warm, it was not overly uncomfortable. In comparison to regular surgical masks, this product offers enhanced ventilation, which I greatly appreciate. I highly recommend it.

This is my 3rd!!! mask purchase. I cycle, both indoors and outdoors. I need an N95 capable mask to cycle indoors and that's assuming the cycle studio I wish to use has taken appropriate mitigation measures to keep riders safe. It has (CycleBar and Dynamic Cycle).T he first two attempts at high performance masks produced (1) the mask never was delivered (I got a quick refund from Amazon though). (2) Terrible fit (no ear loops) and bad seal at the top and bottom. Almost impossible to effectively inhale at high respirations rates. The Base Camp mask is a perfect fit on my face - seals at the top and bottom of the mask (works for my wife who has a smaller narrower face if you follow the cross the straps instructions). Very comfortable. Easy to inhale and exhale at high effort/respiration rates when cycling. Huge advantage for me. In the new normal, if you want to have some normalcy in your life while protecting yourself from infection with both droplet and aerosolized SARS-COV-2 containing particles, you'll need a properly worn mask that fits correctly with N95 level filtration. This one fits well enough to serve that purpose and I have no reason to doubt the N95 certification when using the filters.

This is good mask at this time, primarily because of its high quality replaceable filters. Since most "blown" (non-woven) filter material production has recently been shunted to private medical suppliers, this mask/filter combo seems to be one of the few remaining sources of high filtration masks/filters for the public. The filter layers are designed and technically capable of very high particulate and ozone filtration percentages.However, IMHO, the design has significant limitations:First, masks with outflow valves do not provide optimal source protection. They primarily protect the wearer from other sources. That means if the wearer is a possible source, this mask should probably not be a first choice. The wear of outlfow valve masks may be seen unfavorably by those who know the difference. My personal practice is to wear this mask with a fabric neck gaiter, which I can pull up to cover the valves in public.Second, it is one-size-fits-most. Since mask effectiveness is completely dependent on fit, even a mask with great filters, like this one, may still not be effective for you without modification. Since this mask only has a neck strap and tends to slide down off my nose (even after adjusting the nose clip), I run an additional velcro strap through the ear loops to make a head strap. Wear a baseball cap if you want to hide the strap. Self-adhesive rubber weather strip material (1/2 x 1/4 inch) can be applied as needed inside the shell to improve seal around the nose and upper face area. Even if the metal nose clip comes loose from the shell (it is easily damaged during machine washing), a combination of velcro and weather strip can keep the mask fully functional.IMHO, if you can get a good fit, this mask is better than a commerical industrial valved N95 (which is currently unavailable to the public). Here's why:First, the commerical products are disposible and are typically unusable after a few hours of work. With this mask shell, filters can last for a week of heavy daily use because they never touch my hands or have direct contact with the work environment. Second, the outflow valves are larger than on a commercial mask, resulting in a mask with much easier exhale and less heat/moisture buildup (suitable for strenous exercise/work). This also makes the filters last longer.The shell should be hand-washed only, after removing valves and filters, to prevent damage, especially to the nose piece. Replacement outflow valves should be ordered separately if you plan to use this mask as your primary protection. The valve pieces are easily misplaced or lost when removed from the shell during filter change and washing. The mask is not functional without these valves. My suggestion is to order 2 extra valves for each mask. Since each Base Camp mask has two outflow valves, if you want to replace both of them (or to have a complete pair of two spare valves), you must order a quantity of 2 items.Although the valve is not difficult to replace, there are no instructions included. Supplier pictures indicate that a single silicone diaphragm must first be mounted on the inner valve section, properly seated over its center post and oriented with its concentric ridges forming a slight outward facing-cone.The filter replacement procedure is also the basis for valve replacement, remembering that the inner valve section must be inserted first through the filter and mask outflow holes. Once in place, the outer valve section must be seated and turned a full 90 degrees clockwise to lock into the inner section.To direct outflow in a specific direction, the inner section slots must be correctly aligned relative to the mask prior to attaching the outer section. For example, if you want valve outflow to be directed downward, the inner valve section slots must be aligned vertically, and then the outer valve tabs seated so that the outflow guides appear to be facing forward. After full 90 degree clockwise rotation to lock, mask outflow will now be directed downward.